You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Please book me a flight ticket from JFK to LAX to meet my family.

ASSISTANT: Sure, I am here to help you for this. Could you please share me your trip dates?

USER: I have planned to travel on July 18th and return on July 20th.

ASSISTANT: May I know your name please?

USER: Jeffrey Campbell.

ASSISTANT: Do you have any specifications regarding your journey?

USER: I prefer connecting flight.

ASSISTANT: Is there any other criteria?

USER: No, thanks.

ASSISTANT: Sorry for inconvenience, no flights are found with your specifications.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you very much for contacting our agency.