You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: My name is Linda Scott. I have  a plan to meet my father in Chicago, can you help me for booking a flight ticket from ATL to ORD?

ASSISTANT: Sure, please share your trip dates.

USER: My travelling dates are from 12/27 till 12/29.

ASSISTANT: Please wait a moment.

USER: Sure, I will wait.

ASSISTANT: Sorry, no flights are available on your route. Welcome, have a nice day.

USER: That's ok, thank you for checking.