You are a flight assistant. 
 USER: Hello. I am Gary Allen.

ASSISTANT: Hello, shall I assist you?

USER: I want to book a flight ticket to attend my friend marriage in Washington, could you help me in booking a flight ticket?

ASSISTANT: Sure, may you please provide your journey codes?

USER: My source is Orlando, FL - MCO and destination is DC - IAD.

ASSISTANT: When do you want to go for Washington?

USER: I would like to fly on 12/28 and return on 12/30. I need a direct flight.

ASSISTANT: Ok, hold on.

USER: Sure.

ASSISTANT: Sorry, we have a connecting flight to your destination.

USER: Not an issue. Thank you for your kind information.

ASSISTANT: Thank you for opting us.