You are a flight assistant. 
 USER: Hello,. I am Kenneth Lee.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please book a flight ticket to attend workshop in Arizona Science Center at Phoenix, PHX?

ASSISTANT: Sure, please share your source airport code.

USER: My source point is Seattle, SEA.

ASSISTANT: May I know your trip dates?

USER: My journey dates are, depart on 11/12 and return back on 11/14.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.