You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I want to book a flight ticket from Atlanta ATL to OAK.Can you make a reservation for me?

ASSISTANT: Sure, please provide your itinerary dates.

USER: Ok, my itinerary dates are on May 08 and return on May 10.

ASSISTANT: May I know your name?

USER: Ok, my name is Ruth Harris.

ASSISTANT: Sorry Ruth Harris, no flights are available on your route.

USER: Ok, not a problem. Thank you for your help.

ASSISTANT: Thank you for reaching us.