You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I render you today?

USER: I need to go to Oakland to visit Mountain view cemetery with my college friends. Can you book a ticket on 02/18?

ASSISTANT: Sure, may I know your return date?

USER: I would like to catch a return flight on 02/20.

ASSISTANT: Ok, could you please mention your airport code?

USER: I want to start from Washington, DC-IAD to Oakland, CA-OAK.

ASSISTANT: Do you prefer any halt in between the journey?

USER: Yes, I need a halt in between my journey?

ASSISTANT: Sorry to say that, no flights were found on your connection limit. May I know your name please?

USER: Not a problem, thank you for the information. My name is Virginia Baker.

ASSISTANT: Thank you for serving you.