You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Please reserve me a flight ticket from LGA to LAS.

ASSISTANT: Sure, may I know your trip dates?

USER: My trip dates are Jan 09 and Jan 11.

ASSISTANT: Do you have any other requirements?

USER: I would like to return back in the morning time and an connecting flight.

ASSISTANT: Can I know your name please?

USER: I am James Lewis.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry, we regret to inform you that there is no flight available as per your request.

USER: No problem, thank you for the information.

ASSISTANT: Most welcome.