You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I have to attend a Live Concert at Las Vegas, could you please help me with booking a flight ticket from DEN to LAS?

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

USER: I would like to depart on Dec 14th and return on Dec 16th.

ASSISTANT: Can you please share your class preference?

USER: I am comfortable with any class.

ASSISTANT: Is there any time concern?

USER: I have no other concerns. And I would be comfortable with direct flight.

ASSISTANT: May I know your name please?

USER: I am Nancy Taylor.

ASSISTANT: Wait a moment please.

USER: Sure, take your time.

ASSISTANT: Nancy Taylor, there are no direct flights available in your route.

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you for choosing us.