Excuse me, sir. May I ask you some questions? >>> Year, sure. But I'm miss.
What's your name? >>> Julia.
Is it your full name? >>> Yes, it is.
Where're you from? >>> I'm from Russia.
What part of the country are you from? >>> It's the central part of Russia - Tatarstan republic, actually.
What's your citizenship? >>>The citizen of Russian Federation. 
What's your native city? >>> Kazan is it. 
What nationality are your parents? >>> They are russians.
What's your native language? >>> russian is my native, as you guess
Do you speak any foreign languages? >>> English, tatar
What other foreign languages would you like to know? >>> They are: French,Spanish,German,ect...
What company d'you work for? >>> Family business
Is your company Japanese? >>> No
What's the origin of your company? >>> Russia
Are you here on a business trip? >>> No,I live here
Thank you so much. Good-bye. >>> Not at all. Bye.
Julia

- full name включает не только имя, но и фамилию

- если в названии страны есть слова republic, state, federation, kingdom, то используется определенный артикль the, поэтому следует говорить the Tatarstan (Tatar) Republic, the Russian Federation

- инверсия обычно объясняется эмоциональным состоянием, но в данном случае лучше ответить - "Kazan". или "It's Kazan".

- названия стран, национальностей и языков пишутся с заглавной буквы

Excuse me, sir. May I ask you some questions? >>> Yes,of course.
What's your name? >>> My name is Kuralay.
Is it your full name? >>> No,it isnt.
Where're you from? >>> I am from Kazakhstan.
What part of the country are you from? >>> I am there is in the central party of Kazakhstan
What's your citizenship? >>> My citizenship is kazakhish
What's your native city? >>> My native сity is Karaganda.
What nationality are your parents? >>> My parents are of kazakhish nationality.
What's your native language? >>> My native language is kazakhish
Do you speak any foreign languages? >>> Yes, I do.
What other foreign languages would you like to know? >>> I like kazakhish language
What company d'you work for? >>> I work for Schwarz Pharma
Is your company Japanese? >>> No, it isn't.
What's the origin of your company? >>> It's German.
Are you here on a business trip? >>> Yes. It's a business trip.
Thank you so much. Good-bye. >>> Thank you. Bye too.
Kuralay

- конструкция there is  не нужна, т.к. уже есть начало предложения  I am

- слово party переводится как "партия/сторона договора или переговоров/ вечеринка", в данном случае правильное слово part - часть, район

- названия национальности и языка пишутся с большой буквы

- на вопрос "...would you like to know?", который переводится как "вы бы хотели знать", правильный ответ - "I would like to know the ... language"

Excuse me, sir. May I ask you some questions? >>> Yes, i'm listen your questions.
What's your name? >>> My name is Kate.
Is it your full name? >>> Yes it is.
Where're you from? >>> I'm from in Ukraine.
What part of the country are you from? >>> I'm from in south part of the country.
What's your citizenship? >>> I'm Ukrain citizen.
What's your native city? >>> My native city is Odessa.
What nationality are your parents? >>> My parents are Ukrain.
What's your native language? >>> My native language is ukrain.
Do you speak any foreign languages? >>> I speak in english.
What other foreign languages would you like to know? >>> I'd like to know a spanish.
What company d'you work for? >>> I work for Oriflame.
Is your company Japanese? >>> No, isn't.
What's the origin of your company? >>> It is Swidish
Are you here on a business trip? >>> Yes, it's
Thank you so much. Good-bye. >>> Bye.
Катя

- в первом ответе можно использовать настоящее длительное время, но оно требует ing-окончание в смысловом глаголе, поэтому следует сказать I'm listening to...

- full name - это имя и фамилия

- два предлога from (из) и in (в) не нужны, поэтому ответ будет таким "I'm from the south of the country"

- на вопрос о гражданстве - ответ "I'm Ukrainian"

- фраза "говорить на ...языке" переводится "speak English/

Russian", т.е. ни предлоги, ни неопределенный артикль не используются

- на вопрос "Are you...?" допустимы ответы "Yes, I am/No, I'm not"

Excuse me, sir. May I ask you some questions? >>> Yes? I am
What's your name? >>> My name is Marina
Is it your full name? >>> My full name it is Grigorieva Marina
Where're you from? >>> I am from Russia
What part of the country are you from? >>> From Moscow
What's your citizenship? >>> I am Russia
What's your native city? >>> My native city is Moscow
What nationality are your parents? >>> They are Russian
What's your native language? >>> I am speak Russian
Do you speak any foreign languages? >>> I am learning English
What other foreign languages would you like to know? >>> I`d like to learn Spanish and German
What company d'you work for? >>> I work for Kommersant
Is your company Japanese? >>> No it is not
What's the origin of your company? >>> Nothing
Are you here on a business trip? >>> No, I am not
Thank you so much. Good-bye. >>> Good-bye
Marina

- первый ответ нужно продолжить, т.к. слов I am недостаточно, например,  I'm listening

- национальность и язык - Russian

- фраза "Я говорю по-русски" переводится как I speak Russian

- ответ на вопрос о происхождении компании может быть None. т.е. "нет никакого происхождения" 

Excuse me, sir. May I ask you some questions? >>> Yes, of course!
What's your name? >>> My name`s Svetlana.
Is it your full name? >>> Yes, it`s.
Where're you from? >>> I`m from Russia.
What part of the country are you from? >>> It`s north part of my homeland.
What's your citizenship? >>> I`m russian.
What's your native city? >>> It`s Arkhangelsk.
What nationality are your parents? >>> My parents are russian too.
What's your native language? >>> It`s russian.
Do you speak any foreign languages? >>> I`m learning english and spanish.
What other foreign languages would you like to know? >>> I like chinese, but it`s very hard.
What company d'you work for? >>> I have my own business.
Is your company Japanese? >>> No, it`s russian.
What's the origin of your company? >>> My company was born in Arkangelsk five years ago.
Are you here on a business trip? >>> Yes, I study marketing here.
Thank you so much. Good-bye. >>> Bye!
Svetlana

- если после глагола to be нет продолжения, лучше сказать Yes, it is

- название национальности и языка - с заглавной буквы

- в предпоследнем ответе можно было бы использовать настоящее длительное время -  I'm studying marketing here