You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Cynthia Miller, I want to book a flight ticket on 09/18 and return on 09/20. Can you help me with booking?

ASSISTANT: Sure, may I know your airport codes?

USER: I will travel from CA-OAK to AZ-PHX. I need a flight under fare of 1000.

ASSISTANT: We found a flight on your details with airline UA, flight number: 1009. Shall I proceed for booking?

USER: Sure, please proceed with booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you for helping me with booking.

ASSISTANT: Thanks for choosing us.