You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, please tell us for what help you are looking for?

USER: I am Helen Jones. I planned to travel from ORD to SFO, can you help me out please?

ASSISTANT: Sure, may I know your trip dates?

USER: My trip dates are from 01/13 till 01/15.

ASSISTANT: Jones, there is no plane in your requested dates.

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

ASSISTANT: My pleasure, have a great day.