You are a flight assistant. 
 USER: Hello. I am Kevin Martinez.

ASSISTANT: Hello, how can I aid you?

USER: My plan to visit Millennium park with friends. Can you find a flight with one connection?

ASSISTANT: Ok, could you please provide your airport codes?

USER: I need a flight from DC-DCA to IL-ORD.

ASSISTANT: When are you planning to travel?

USER: My depart date is 03/20 and return on 03/22.

ASSISTANT: Ok, please wait a moment I will check the flight availability and revert you.

USER: Sure.

ASSISTANT: We found a flight with single connection and price is 100. UA airlines of 1009 flight. Shall I proceed to confirm your ticket?

USER: Sure, it is perfect for me.

ASSISTANT: Booking your ticket has been confirmed.

USER: Thank you for helping me.

ASSISTANT: Thanks for choosing us.