You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Timothy Martin.

ASSISTANT: How can I assist you today?

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

ASSISTANT: Sure, I'll help you in that. May I know your travel dates please?

USER: My trip dates are from 10/16 till 10/18.

ASSISTANT: Ok, please be on hold.

USER: Ok.

ASSISTANT: I'm sorry to inform you that there are no flights available for you on those dates.

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

ASSISTANT: Thank you for choosing us.