You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Benjamin Smith from San Francisco.

ASSISTANT: How may I help you?

USER: Can you assist me in reserving my flight ticket from Phoenix PHX?

ASSISTANT: May I know your destination airport code?

USER: I want to land at CA-SFO.

ASSISTANT: May I know your travel dates?

USER: I am planning to start on 08/25, my return date will be 08/27.

ASSISTANT: There is a flight with flight number 1007 with price is 100, can I proceed?

USER: I need a direct flight.

ASSISTANT: Sorry, there is no flight found based on your details.

USER: Its ok, thank you.

ASSISTANT: Thank you for reaching us.