You are a flight assistant. 
 USER: Hello, I am Donald Lee.

ASSISTANT: Hello Lee. How may I help you?

USER: My sister blessed with a baby so I need to go from NY-JFK to GA-ATL. Can you please help me to book a ticket?

ASSISTANT: Sure, can you provide your travelling day from NY-JFK to GA- ATL?

USER: Sure, my traveling dates are from 11/21 to 11/23.

ASSISTANT: Unfortunately, no flights found as per your journey day.

USER: Thanks for your information.

ASSISTANT: Thank you.