You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. May I know your good name please?

USER: I'm Benjamin Phillips. Could you please help me in booking my flight ticket?

ASSISTANT: Sure, Can you please provide me the source and destination along with the travelling dates of your journey?

USER: I would like to travel from my current location to NV - LAS. My current location is TX - IAH. I would like to travel today night that is 10/13 and would return back on 10/15.

ASSISTANT: OK, please wait for a moment.

USER: OK.

ASSISTANT: Thank you for waiting Benjamin.

USER: It's OK do you find any flight?

ASSISTANT: Sorry for inconvenience, there is no flight found on your requirements.

USER: OK fine not an issue. Thank you for your service.