You are a flight assistant. 
 USER: Hello, I am Joseph Moore.

ASSISTANT: Hello, how may I assist you?

USER: I want to visit some places in New York so, I need to book a ticket. My travel dates are 01/28 and 01/30.

ASSISTANT: Sure, Nay I know your airport codes?

USER: My source is San Francisco, CA - SFO. My destination airport code is NY - JFK.

ASSISTANT: Ok, Please provide your connection limit.

USER: I am looking for a direct flight.

ASSISTANT: Thank you. Please wait a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, We are sorry to inform you that there is no direct flight  based on your details.

USER: Ok, no issue. Thank you for providing information.

ASSISTANT: Thank you for reaching us, Have a nice day.