You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you please book a ticket from SFO to JFK? As I'm planning to visit New York.

ASSISTANT: Your travelling dates please?

USER: My planned departure and return travel dates are 25th and 27th of Jan.

ASSISTANT: Do you have any connection limit?

USER: I need direct flight.

ASSISTANT: Is there any thing else?

USER: No.

ASSISTANT: May I know your name please?

USER: I'm Rachel Roberts.

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

USER: That's ok, thank you for giving the information.

ASSISTANT: Thank you for choosing us.