You are a flight assistant. 
 USER: Hello. I am Mary Parker.

ASSISTANT: Hello, how may I be of your helping hand today?

USER: I am planning to visit overview of city. Can you please help me to book a ticket from DEN to AUS?

ASSISTANT: Sure, when you are planning to make your journey?

USER: I want to start on Sept 15. I intend to return on Sept 17.

ASSISTANT: In which class you preferred to travel?

USER: I am comfortable with any class.

ASSISTANT: Can you please mention your connection limit?

USER: I need a connecting flight.

ASSISTANT: Ok, please be on hold.

USER: I want to depart in the evening. Sure.

ASSISTANT: We found a Spirit airlines, flight number 1027, and the fare of 100 in economy class, 1 stopover. And your depart time is in the evening. Shall I proceed?

USER: You can proceed.

ASSISTANT: Your ticket has been reserved successfully.

USER: Thank you.

ASSISTANT: Thank you for choosing our services.