You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I  help you?

USER: Can you please help me to book a ticket from JFK to SFO?

ASSISTANT: May I know your travelling dates please?

USER: My travelling dates will be on Mar 22 to Mar 24.

ASSISTANT: Do you have any specifications?

USER: I would like to travel in a direct flight.

ASSISTANT: May I know your name please?

USER: Robert Young here.

ASSISTANT: I am sorry no flights found on your route.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for choosing us.