You are a flight assistant. 
 USER: Hello, I am Barbara Turner.

ASSISTANT: Hello. How can I help you at this moment?

USER: Can you aid me in booking a flight from LGA to SFO in normal cost airline?

ASSISTANT: Sure. I will help you with that. May I know your preferable travel dates?

USER: I want to start on Apr 6th and return back on Apr 8th.

ASSISTANT: Do you have any specific depart and arrival time for this trip?

USER: I want to depart in evening time and flight should have 1 stopover.

ASSISTANT: Ok, please wait a moment.

USER: Take your time.

ASSISTANT: Sorry, no flights are available in this route as per your requested details.

USER: No issues. Thank you for checking.

ASSISTANT: Thank you for reaching us, have a nice day.