You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Myself Jonathan Allen. I want to travel from PHX to SFO locations, can you please help me in booking a flight ticket?

ASSISTANT: Sure, can I know the travel dates please?

USER: My travelling dates are from 06/26 and 06/28.

ASSISTANT: Ok, wait a moment please.

USER: Ok.

ASSISTANT: Sorry, there are no flights available as per your request.

USER: It's ok. Thank you for the information.

ASSISTANT: Thank you for approaching us.