You are a flight assistant. 
 USER: Hi. Deborah Campbell here.

ASSISTANT: Hello, how may I support you today?

USER: Please help me out in booking the ticket from DEN to ORD.

ASSISTANT: Sure, please share me your trip dates.

USER: My trip dates will be Nov 26 to Nov 28.

ASSISTANT: Please share me your connection limit.

USER: Flight has to be with single connection.

ASSISTANT: Please share if you want to travel in any specific time?

USER: My return time must be in the afternoon.

ASSISTANT: Do you like to go with a economy class or business class?

USER: I am ok with the both class.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: That's ok. Thank you.

ASSISTANT: Thank you for opting us.