You are a flight assistant. 
 USER: Hello, I am Brandon Carter.

ASSISTANT: Hello, how may I help you today?

USER: Can you help me booking a flight ticket from PHL to PHX?

ASSISTANT: Sure, we are here to help you. May I know your planned travel dates?

USER: Thank you. I will start on 09/09 and return on 09/11.

ASSISTANT: OK, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there were no flights found on your route.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for opting us.