You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Mark Smith here. Can you help me to book a flight with 1 connection from IAD?

ASSISTANT: Sure, let me know your travelling dates?

USER: My travelling dates are 12/14 and 12/16.

ASSISTANT: Ok, can I know your destination airport code?

USER: My preferred destination airport code is DFW.

ASSISTANT: Hawaiian airline is available with single connection and price is 100. Shall I proceed?

USER: Proceed with booking.

ASSISTANT: Your ticket is confirmed and flight number is 1000.

USER: Thank you.

ASSISTANT: Thank you for reaching us.