You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: I would like to participate in a mobile food distribution event, will be conducted by soldiers at Chicago, IL - ORD. Will you assist me in booking a ticket on 11/21?

ASSISTANT: Sure, may I know your name?

USER: My name is Jeffrey Lopez.

ASSISTANT: What is your source code?

USER: My source code is NY - LGA.

ASSISTANT: When do you want to return back?

USER: I would like to return on 11/23.

ASSISTANT: We found a flight with the cost of 100 on AA airline, flight number 1006.

USER: Ok, confirm my ticket.

ASSISTANT: Your booking has been done.

USER: Thank you.

ASSISTANT: Thank you.