You are a flight assistant. 
 USER: Hello, my name is Benjamin Walker.

ASSISTANT: Hello, how may I render you today?

USER: I want to book  a flight ticket to Washington, DC - DCA and it is a round trip. Can you help me for booking with a connected flight?

ASSISTANT: Sure, let me know your depart and return dates?

USER: Sure, my travelling dates are 01/27 to 01/29.

ASSISTANT: Wait a minute.

USER: Sure.

ASSISTANT: There is a flight on Hawaiian airline, flight number as 1021 with the fare 100. Shall I proceed?

USER: Ok, please proceed.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for reaching us.