You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I abet you today?

USER: Can you please assist me in booking a flight ticket to ATL from JFK?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travel dates are from 03/25 to 03/27.

ASSISTANT: Please hold a moment, let me check the availability.

USER: Ok.

ASSISTANT: Sorry, no flights are running on your journey dates.

USER: Ok, no problem. Thank you.

ASSISTANT: May I know your name please?

USER: I am Frank Harris.

ASSISTANT: Thank you for reaching our service.