You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I oblige you today?

USER: I want to book a  direct flight ticket to attend Chicago International Auto Show, they are exhibiting more than 400 vehicles from many branded companies. Can you help me with this booking?

ASSISTANT: Sure, I am mirthful to help you. May I know on what dates would you like to travel to Chicago?

USER: 12/24 and 12/26 are my comfortable journey dates.

ASSISTANT: Can please provide me your landing airport code?

USER: I would like to reach SEA.

ASSISTANT: Can you please provide me your take off airport code?

USER: ORD will be my nearest airport code .

ASSISTANT: May I know your good name please?

USER: Sure, Timothy Thompson here.

ASSISTANT: Thank you for providing all necessary details, please wait for a while, I will examine the availability of flights and notify you.

USER: Ok, Take your time.

ASSISTANT: Thanks for waiting. We are unable to provide the flights in between your routes.

USER: No issue. I will choose other alternative.

ASSISTANT: Ok.

USER: Thanks for the information.

ASSISTANT: Thank you so much for choosing us. Have a good day.