You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER:  Help me in booking a flight form IAD to DCA?

ASSISTANT: Can I have your journey dates?

USER:  My travelling dates are Dec 22 to 24.

ASSISTANT: Do you need any connection limit?

USER:  I prefer connection flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: May I know your name?

USER: I am William Clark.

ASSISTANT: We found a connecting flight in Hawaiian Airline with a fare of 100 which departs at 23:00 and return at 10:00. Shall I proceed for booking?

USER: Proceed.

ASSISTANT: Your ticket is reserved in flight 1018.

USER: Thank you.

ASSISTANT: Thank you for opting us.