You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Rebecca Young.

ASSISTANT: How can I help you today?

USER: Can you help me in booking the ticket from DEN to ATL?

ASSISTANT: Sure, I will help you in booking, please share your travelling dates?

USER: My planning dates are from 01/15 to 01/17.

ASSISTANT: Ok, wait for a moment please. Sorry no flights as per your details.

USER: That's fine.

ASSISTANT: Thank you for utilising our services.

USER: Thank you.