You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I support you?

USER: Can you please help me in booking a flight ticket from PHX to LAS?

ASSISTANT: Sure, I would be happy to help you.

USER: Thank you.

ASSISTANT: Will you please let me know your trip dates?

USER: My trip dates are from Jan 22nd to Jan 24th.

ASSISTANT: Do you prefer either connecting flight or direct flight?

USER: I prefer a connecting flight.

ASSISTANT: Please give me a moment.

USER: Make sure that I need to return in the afternoon with economy class.

ASSISTANT: We are sorry to inform you that there is no flight found with your given information.

USER: No problem. Thank you.

ASSISTANT: May I know your name?

USER: I am Brian Scott.

ASSISTANT: Thank you.