You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am very found of trekking, I have planned to travel Mount Evans in the month of November which is located in Denver. Can you please help me in booking my flight ticket from Chicago?

ASSISTANT: May I know your desired travel dates please?

USER: Sure, my desired travel dates are 11/10 and 11/12.

ASSISTANT: Can I know your preferred airport codes please?

USER: Sure, my preferred airport codes are ORD and DEN.

ASSISTANT: Please wait a while. There is a flight with connection limit 0 and fare 200, shall I proceed for booking?

USER: I need a single connected flight for my journey can you please recheck it and let me know?

ASSISTANT: There is no flight on your desired travel dates.

USER: Ok, not an issue. I will go with another service to complete my trip. Anyways thank you for the information.

ASSISTANT: May I know your name please?

USER: Sure, my name is Christine Miller.

ASSISTANT: Thank you for opting us.