You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Frank Hall.

ASSISTANT: How can I help you today?

USER: I am looking for a flight from IAD to OAK, can you help me in booking?

ASSISTANT: Sure, I am glad to help you in booking. Can you please share your travel dates?

USER: Sure, my planned travel dates are Aug 18 and Aug 20.

ASSISTANT: Do you have any specifications?

USER: I would like to start my journey for the afternoon flight with 1 connection.

ASSISTANT: Flight 1007 in Delta airlines is available for you with 1 stopover and it costs you 200. Can I proceed?

USER: That's fine, please proceed in booking with this flight.

ASSISTANT: Your booking is done.

USER: Thank you for the service.

ASSISTANT: Thank you for opting us, have a safe flight.