You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I am looking for a direct flight from SFO to ATL. Could you book a ticket for me?

ASSISTANT: Please mention your journey dates for further process.

USER: My itinerary dates are 10/12 and 10/14.

ASSISTANT: Please wait for a moment.

USER: My name is Gregory Young.

ASSISTANT: Sorry Young, there is no flight available on your route.

USER: It's ok, thank you.

ASSISTANT: Thank you for reaching us, have a nice day.