You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I am Ashley Walker. I want to book a flight ticket from Denver to Phoenix.

ASSISTANT: Ok, may I know your price limit?

USER: Sure, my price limit is 200.

ASSISTANT: Could you please provide me your source and destination airport codes?

USER: I am planning to attend interview in AZ - PHX and my source from CO - DEN.

ASSISTANT: May I know your planned journey dates?

USER: My departure is 01/02 and return date on 01/04.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting. I found a Delta airline, flight number: 1027, price: 200 with one connection.

USER: You can proceed to booking.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thanks for booking a flight ticket.

ASSISTANT: Thank you for opting us.