You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Please book a ticket from DCA to BOS to go for long trips.

ASSISTANT: Sure, may I know your planned travelling dates?

USER: My travelling dates Apr 13 and Apr 15.

ASSISTANT: May I know your name for further checking?

USER: I am Donna Evans.

ASSISTANT: May I know your connection limit please?

USER: I want single connection.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: American airline is providing a connecting flight of fare 100 with economy class, shall I proceed for booking?

USER: Ok, please proceed.

ASSISTANT: Your ticket has been confirmed with flight number 1002.

USER: Thank you.

ASSISTANT: Thank you for reaching us.