You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am James Collins. I want to book a ticket from DFW to ATL.Can you help me out to book a ticket?

ASSISTANT: Sure, can you share your dates to travel?

USER: My preferable dates are 05/30 to 06/01. My price limit is 200.

ASSISTANT: Ok, there is no flight for you according to your information.

USER: That's fine.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your help.