You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you at this moment?

USER: I am Paul Thompson. Can you please help me in booking a flight ticket from PHX to SFO?

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: I want to fly on Aug 08 and return on Aug 10.

ASSISTANT: Noted. Do you have any preferences?

USER: I need a direct flight.

ASSISTANT: Sorry, there is no flight available matching your requirements.

USER: Not an issue. Thank you.

ASSISTANT: You are welcome, have a nice day.