You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Paul Scott.

ASSISTANT: Paul Scott, how may I assist you with today?

USER: Can you please aid me in searching a flight from Chicago to Denver?

ASSISTANT: Sure, I will help with it. Could you please be more specific with your airport codes?

USER: Thank you. The airport codes are ORD and DEN.

ASSISTANT: Thank you for the confirmation, may I have your planned travel dates?

USER: My planned travel dates are June 17 and June 19.

ASSISTANT:  I am sorry to say that there are no flights available with your requirements.

USER: It's ok, not a problem. I will choose some other source to travel. Thank you for your help.

ASSISTANT: Thank you for reaching us, have a great time.