You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I need to reserve a ticket from LAS to DEN, can you help me in doing that?

ASSISTANT: Sure. Tell me your travel dates please?

USER: My trip dates are Aug 29 to 31.

ASSISTANT: May I know your name please?

USER: Janet White here.

ASSISTANT: Are you looking for a stopover in your journey?

USER: I need a direct flight.

ASSISTANT: Any other preferences?

USER: No.

ASSISTANT: Thanks for waiting. But I am sorry to say that there are no flights available.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you.