You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am Donald Clark. Can you please help me in booking the flight ticket from DEN to ORD?

ASSISTANT: Sure Donald Clark, I will try to help you but I need your journey dates to search a flight.

USER: Sure, my travelling dates are 11/08 and return on 11/10.

ASSISTANT: Please wait for a minute.

USER: Ok.

ASSISTANT: Thanks for your waiting, I found a flight with price 1400 and connection is 1, shall I proceed?

USER: Sorry, my price is 200. Can you plese check it.

ASSISTANT: Ok fine, please wait for a minute.

USER: sure.

ASSISTANT: Sorry for this inconvenience Donald Clark, I could not find any flight with fare 200 for this route.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thanks for choosing us, have a great day ahead.