You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I would like to play poker at Las Vegas. Can you help me in booking a ticket from SFO to LAS?

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

USER: My planned journey dates are 04/07 and 04/09.

ASSISTANT: May I know your good name please?

USER: My name is George Mitchell.

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

USER: It's ok, no issues. Thank you for the information.

ASSISTANT: You are welcome.