You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I support you today?

USER: The Columbus Day is to be on 10/09, so I need your assistance to book a ticket for participating in that event.

ASSISTANT: Ok, may I know your source and destination airport codes?

USER: Source point is at Detroit, DTW and destination is at Washington, IAD.

ASSISTANT: When would you like to return?

USER: My travelling dates are from 10/08 to 10/10.

ASSISTANT: May I know your good name please?

USER: Eric Parker is my name.

ASSISTANT: We found a connecting flight with fare of 100 in UA airline. Shall I proceed for booking?

USER: Ok, proceed with booking.

ASSISTANT: Your ticket has been booked with in 1023 flight number.

USER: Thank you for your helping hand.

ASSISTANT: Thanks for opting us.