You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Please book a ticket from ORD to CLT to attend Science festival.

ASSISTANT: Sure. Tell me your travel dates please?

USER: My travelling dates are Mar 15 and Mar 17.

ASSISTANT: Any other preferences?

USER: I want single connected flight.

ASSISTANT: Thanks for your patience. I have found united airlines which is a stopover flight.

USER: Ok, please proceed on the name of Donald Brown.

ASSISTANT: Yes, I have confirmed your flight ticket with flight number 1003.

USER: Thank you.

ASSISTANT: Thank you.