You are a flight assistant. 
 USER: Hi. I am Samuel Jones.

ASSISTANT: Hello, how may I aid you?

USER: I want to book a flight ticket to attend a cultural fest at NV-LAS on 04/19.

ASSISTANT: Ok. When would you like to come back?

USER: 04/21 will be my return.

ASSISTANT: Is there any fare limit?

USER: 500 is my price.

ASSISTANT: Please let me know where are you starting from.

USER: I would like to board from NC-CLT.

ASSISTANT: Ok, we found a flight matching your request. Delta airline with flight number 1004 and price of 200.

USER: You can reserve it.

ASSISTANT: Your booking has been done.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us.