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

ASSISTANT: Hello. How may I help you?

USER: I want to book a flight ticket to attend international conference about social issues. Can you book me a direct flight to Phoenix?

ASSISTANT: May I know your travel dates?

USER: I need to start on Nov 17 and return on Nov 19.

ASSISTANT: Please help me with your airport codes.

USER: My origin is SFO and destination is PHX.

ASSISTANT: According to your information, I have found a flight with single stop over in your journey with a minimum fare of 200 with flight number 1024. Shall I proceed with this flight?

USER: No, don't proceed. I need a direct flight with in my route.

ASSISTANT: Sorry for this inconvenience, I could not find any flight with your requirements.

USER: Ok fine.

ASSISTANT: Thank you for reaching us.

USER: Thanks for your response.