You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: I would like to return from New York after finishing off my work on 04/24. Can you help me book a flight ticket from Phoenix on 04/22?

ASSISTANT: Sure. Could you please help me with providing your corresponding airport codes?

USER: They are planned to be from PHX to EWR.

ASSISTANT: How much you can spend for airfare?

USER: 500 is my price limit.

ASSISTANT: May I know your name?

USER: My name is Frank Davis.

ASSISTANT: We found a Frontier airline, flight number:1008 and the price is 100.

USER: Proceed for booking with this airline.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for your service.

ASSISTANT: Thank you for consulting us.