You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Larry Scott here.

ASSISTANT: How can I help you now?

USER: I want to take a Hot Air Balloon Ride in Phoenix - PHX, can you please help me to book a flight ticket from DEN?

ASSISTANT: Sure, I am here to do that. May I know your travel dates please?

USER: I will travel on Sept 15th and return back on Sept 17th.

ASSISTANT: Do you have any price limit?

USER: I can pay up to 200.

ASSISTANT: May I know about your other specifications?

USER: I want one connection.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry to say that, there is no flight available as per your schedule.

USER: No problem, thank you for your information.

ASSISTANT: Anyways, thank you for opting us.