You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: I am Richard King. Could you help me in booking a flight ticket from BOS to ATL?

ASSISTANT: Sure, can I know your preferable dates?

USER: I am planning to start on 06/16 and return back on 06/18.

ASSISTANT: I am sorry, there are no flights available.

USER: Ok, thank you for the information.

ASSISTANT: Thank you, have a great day ahead.