You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Stephen Hill here.

ASSISTANT: How may I aid you today?

USER: Can you book a flight ticket for my airport codes that is from LAS to DEN?

ASSISTANT: Can you please share your preferable journey dates?

USER: The travel dates are from June 03 to June 05.

ASSISTANT: May I know your name please?

USER: I am Stephen Hill.

ASSISTANT: Do you have any connection limit?

USER: I prefer a stopover flight.

ASSISTANT: Is there any other specifications?

USER: The depart time would be in the evening. I prefer a business class.

ASSISTANT: I am sorry to say that there is no flight found under your details.

USER: Not a problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you.