You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I am Cynthia Adams. I am looking for a flight from PHX to PHL, can you please help me in booking a flight ticket?

ASSISTANT: Sure, may I know your travel dates?

USER: My travelling dates are Feb 19 and Feb 21.

ASSISTANT: Do you have any preferences?

USER: My departure time is evening.

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

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for opting us.