You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Myself Gary Brown. Will you help me in booking the flight ticket from HOU to PHL?

ASSISTANT: Sure, may I know your preferable travel dates please?

USER: My preferable journey dates are 07/14 and 07/16.

ASSISTANT: Sorry for the inconvenience, there is no flight available on your requested dates.

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

ASSISTANT: You are welcome.