You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: Myself Christopher Hill. Will you help me in booking the flight ticket from SFO to LAS?

ASSISTANT: Ok, can I know your preferable dates?

USER: My travelling dates are July 04 and July 06. Flight has to be with single connection.

ASSISTANT: I am sorry, there are no flights available.

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

ASSISTANT: Thank you, have a good day.