You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Sarah Baker, I want to attend a business seminar meeting at Francisco. Can you please help me in booking the ticket from PHX to SFO?

ASSISTANT: May I know your trip dates?

USER: I am willing to travel on 09/30 and again I will retrieve on 10/02.

ASSISTANT: Sorry, there is no flights available.

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

ASSISTANT: That's ok, thank you for your service.