You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Catherine Smith.

ASSISTANT: How can I help you?

USER: I am looking for a flight from DEN to ORD, can you help me out?

ASSISTANT: Sure, I am glad to help you. May I know your travel dates?

USER: My travel dates are from 09/23 till 09/25.

ASSISTANT: Please wait for a while.

USER: I need a connecting flight.

ASSISTANT: Sorry Smith, as per your requirement there are no flights available.

USER: That's ok, no problem. Thank you for your information.

ASSISTANT: Thank you for opting us.