You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Kevin Walker.

ASSISTANT: Welcome Kevin. How can I assist you at this moment?

USER: I would like to meet my family after a long gap at Chicago, please help me in booking a ticket from CLT to ORD.

ASSISTANT: Sure Kevin, I will help you with that. Can you please provide me your travel dates too?

USER: My journey dates are 12/27 and 12/29.

ASSISTANT: Ok Kevin, please be on hold for a moment.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting. Sorry Kevin Walker, no flight is a available to you on your dates.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Most welcome. Thank you for choosing us, have a good day.