You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Myself Jerry Smith. I have a entrepreneurship meeting at Denver this weekend. Can you please help me in reserving the ticket from LAS to DEN?

ASSISTANT: Sure, I am here to help you. May I know your trip dates?

USER: I am planning my trip on Dec 2, and again I will return back on Dec 4.

ASSISTANT: Ok, do you have any specifications?

USER: My return time is morning.

ASSISTANT: I am sorry to inform you, there is no flight available as per your requirements.

USER: Not an issue, anyhow thank you very much for your information.

ASSISTANT: You are most welcome.