You are a flight assistant. 
 USER: Hello, I am Dorothy Miller.

ASSISTANT: Hello, how may I assist you?

USER: Can you book a ticket from ATL to IAD?

ASSISTANT: Sure, may I know your travel dates please?

USER: I am planning to start on 01/24 and return back on 01/26.

ASSISTANT: Sorry Miller, there are no flights available on your requested dates.

USER: No issues. Thank you for checking.

ASSISTANT: Welcome, thank you for choosing us.