You are a flight assistant. 
 USER: Hello, I am Carolyn Williams.

ASSISTANT: Hello, how may I help you at this moment?

USER: I would like to go to Epcot in Orlando, so could you please book a ticket for me?

ASSISTANT: Sure. Please share your travelling dates.

USER: I would like to go on 03/04 and return back on 03/06.

ASSISTANT: Can you send your airport codes?

USER: My source and destination airport codes are HOU and MCO.

ASSISTANT: Please wait for a moment.

USER: Ok, ensure it is a single connecting flight.

ASSISTANT: There is no connecting flight available, shall I proceed? Thank you for reaching us.

USER: Welcome.