You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Myself Patricia Thompson. I am looking for a flight form CLT to PHL, can you help me in booking?

ASSISTANT: Sure, I will help you. Please let me know your travel dates.

USER: Sure, my travel dates are Dec 18 and Dec 20.

ASSISTANT: Ok, do you have any class preference?

USER: No, I am not looking for any class preferences but make sure that I need a direct flight under 1000 price limit.

ASSISTANT: Ok, is there any other requirement you are looking from us?

USER: Can you look for a Business class if possible?

ASSISTANT: Sorry to inform you that there is no business class ticket available on your preferred travel dates.

USER: That's ok, no problem, Thank you for the information.

ASSISTANT: You are welcome and thank you for choosing us.