You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Michael Williams. I would like to travel from SEA to PHX, can you please help me to book a flight ticket?

ASSISTANT: Sure, may I know your trip dates?

USER: Sure, my trip dates are Jan 06 and Jan 08.

ASSISTANT: Do you have any other specifications?

USER: My return time is afternoon.

ASSISTANT: Do you have any class reference?

USER: No.

ASSISTANT: Sorry, there are no flights available.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for approaching us.