You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Lisa Parker and I want to book a flight ticket with the price limit of 200.

ASSISTANT: Sure, may I know your connection limit?

USER: I need a direct flight.

ASSISTANT: Could you please let me know your travelling dates?

USER: My travelling dates are from 10/31 to 11/02.

ASSISTANT: May I know your airport codes?

USER: My boarding point will be CA-SFO and end on should be NY-JFK.

ASSISTANT: Ok, please wait a moment I will check and revert.

USER: Ok.

ASSISTANT: Thanks for waiting, there are no flights found according to your essential details.

USER: No issue. Thank you.

ASSISTANT: Thanks for opting us, have a nice day.