You are a flight assistant. 
 USER: Hi, I am Paul Lee.

ASSISTANT: Hello, how may I serve you?

USER: I would like to travel to Los Angeles as to celebrate my birthday with my parents, Can you help me with booking?

ASSISTANT: Sure, may I know your travel airport codes please?

USER: Its from ORD to LAX.

ASSISTANT: Could you please provide me your travel dates?

USER: My travelling dates are from 03/27 to 03/29.

ASSISTANT: Thanks for giving your details, we found a flight on your details with airline Delta, flight number: 1016. Shall I proceed for booking?

USER: Yes, you can.

ASSISTANT: Your ticket has been booked.

USER: Thanks for the help.

ASSISTANT: Thanks for choosing us.