You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am Raymond Jones. I want to book a flight ticket from LGA to SFO. Could you help me in booking?

ASSISTANT: Please can you mention the dates you have planned?

USER: My travelling dates are from Sep 15-17.

ASSISTANT: Ok, please can I know the airlines you prefer?

USER: I am comfort with any.

ASSISTANT: Please let me know if you have any specifications.

USER: I need direct flight.

ASSISTANT: Sorry Raymond Jones, there is no flight available at your location to book.

USER: That's ok, no problem. Thank you.