You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Karen Davis. I want to reserve a flight ticket from ORD to DEN. Will you please help me in booking a flight ticket?

ASSISTANT: May I know your desired travel dates please?

USER: My travelling dates are 12/26 and 12/28.

ASSISTANT: There is a flight with connection limit 1 and fare 100, is it ok for you?

USER: Yes, do proceed.

ASSISTANT: Ticket is reserved, flight number 1020.

USER: Thank's a lot for your help.

ASSISTANT: Thank you for opting us.