You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I am Helen Turner. I want to book a flight ticket from ATL to ORD. Could you help me in booking?

ASSISTANT: Sure, we are here to help you. Kindly mention your travel dates.

USER: My travelling dates are from 12/09 to 12/11.

ASSISTANT: How much can you afford for this journey?

USER: My price limit is 200.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry to inform, no flights found with your requirement.

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

ASSISTANT: Thanks for reaching us.