You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Myself Mark Anderson, I have a conference meeting at Phoenix. Can you please help me in reserving the ticket from SEA to PHX?

ASSISTANT: Sure, may I know your trip dates?

USER: I am willing to leave on May 3rd and again I will return back on May 05.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there is no flights available on these dates.

USER: Not a big deal, anyhow thank you very much for service.

ASSISTANT: Most welcome.