You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you out?

USER: I am Brandon Evans,I need a flight to Phoenix, AZ-PHX to attend a live music event. Can you help me with the booking?

ASSISTANT: Sure, I will book you a ticket. To book a ticket I need your source airport code.

USER: My origin is at Detroit, MI - DTW.

ASSISTANT: Can you share your travelling dates?

USER: I want to fly on 10/12 and 10/14.

ASSISTANT: Ok, please wait a moment, I will revert you.

USER: OK.

ASSISTANT: Thanks for waiting, but no flights found.

USER: Ok, no issues. Thanks for your help and support.

ASSISTANT: Thank You.