You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Christine Evans.

ASSISTANT: How may I be of your help?

USER: I want to go to my grandmother memorial service at Oakland, CA - OAK. Can you please help me in booking?

ASSISTANT: Sure, we are here to make your journey comfort.

USER: Thank you.

ASSISTANT: Do you need a halt in between your journey?

USER: Yes, I need a halt.

ASSISTANT: Kindly mention your planned travelling dates to proceed further.

USER: I want to travel on 09/22, and need to catch return flight on 09/24.

ASSISTANT: may I know your source airport code?

USER: Source is from DCA.

ASSISTANT: Ok, please wait a moment I will search best flight for you.

USER: Sure.

ASSISTANT: Thank you for waiting, we found a Delta airline matching your details with single connection and the fare is 200. Shall I book the ticket?

USER: Proceed with the booking.

ASSISTANT: Your ticket has been confirmed with the flight number-1009.

USER: Thanks for the assistance.

ASSISTANT: Thank you for reaching us.