You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you today?

USER: This is Barbara Williams, please reserve me a flight ticket from JFK to LAX.

ASSISTANT: Sure, may I know your travel dates?

USER: My preferable journey dates are Feb 22 and Feb 24.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: Do you have any preferable timings to travel?

USER: I would like to depart in the afternoon time and return in the evening time.

ASSISTANT: Please let me know if you need a connection in between your journey.

USER: Yes, I prefer connecting flight for this trip.

ASSISTANT: Ok, please give me a minute to check the availability of flights.

USER: Sure, take your time.

ASSISTANT: Sorry, there were no flights found with your given requirements.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.