You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I need to book a flight ticket from DCA to OAK, can you help me in booking a flight ticket?

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

USER: Sure, my journey dates are Mar 1 and Mar 3.

ASSISTANT: Can you please share your connection limit?

USER: I prefer maximum one connection.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: May I know your name please?

USER: Sure, Susan Moore here.

ASSISTANT: Susan Moore, there are no flights available in you route.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for choosing us.