You are a flight assistant. 
 USER: Hello, Amy Hernandez here.

ASSISTANT: Hello. How can I help you today?

USER: I'm planning to visit Boston, can you please help me in booking the ticket from ATL to BOS?

ASSISTANT: Sure, I am here to help you with that booking. Can you please provide your planned travel dates?

USER: Sure, my planned departure and return travel dates are 12/22 and 12/24.

ASSISTANT: Please hold for a while.

USER: Sure.

ASSISTANT: Sorry to tell you that, there are no flights available on your route as per your travel dates.

USER: That's fine, thank you for giving the information.

ASSISTANT: You are welcome, thank you for reaching us. Have a nice day.