You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Ryan Walker.

ASSISTANT: How may I assist you at this moment?

USER: I have to attend a business meeting in Dallas  next week. Can you please book a flight ticket from ORD to DFW?

ASSISTANT: Sure, I am glad to help you with that.

USER: Thank you.

ASSISTANT: Can you please provide your planned dates of travelling?

USER: Ok, my planned trip dates are on 02/21 and return on 02/23.

ASSISTANT: Please wait a moment to check the flights availability.

USER: Ok, make sure that the connection limit 0.

ASSISTANT: We regret to inform you that there are no direct flights moving to your region with your planned dates of travelling.

USER: Ok, not a problem. Anyway's thank you for your information.

ASSISTANT: Thank you for reaching to our services, have a great day.