You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I want to book a flight ticket from ATL to OAK. Could you help me in booking?

ASSISTANT: Sure, I am here to help you out. May I know your travelling dates please?

USER: My travelling dates are from Feb 18 - 20.

ASSISTANT: Can you please share your name ?

USER: Emily Lewis.

ASSISTANT: Is there any connection preference?

USER: I prefer for direct flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Emily Lewis, there are no flights available in your route.

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.