You are a flight assistant. 
 USER: Hello. I am David King.

ASSISTANT: Hello, how may I aid you?

USER: I need to fly Chicago, could you please help me in booking my flight ticket from ATL to ORD?

ASSISTANT: Sure, please share your travel dates?

USER: My planned trip dates are 10/24 and 10/26.

ASSISTANT: Ok, do you have any price restriction?

USER: My price limit is 5000.

ASSISTANT: Sorry to say that, there are no flights available on your preferred route.

USER: Ok, no issues. Thank you for your service.

ASSISTANT: Thank you for reaching us.