You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Rebecca Wright. I want to book a flight ticket from NY - JFK to AZ - PHX, can you help me with that?

ASSISTANT: Sure, can I have your travelling dates please?

USER: I would like to fly on 04/20, return on 04/22.

ASSISTANT: How much can you expend for flight ticket?

USER: My price limit is 500.

ASSISTANT: We found a flight with an airline UA of flight 1005 and price is 100. Would you like me to proceed?

USER: Yes, please.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for choosing us.