You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, How can I useful to you today?

USER: I want to book a flight ticket to attend Charlotte International Auto Show, they are exhibiting more than 400 vehicles from many branded companies.

ASSISTANT: Sure, we are mirthful to help you in booking.

USER: Thank you.

ASSISTANT: May I know your boarding and landing airports with codes?

USER: I want to board from Seattle, SEA and land at Charlotte, CLT.

ASSISTANT: Ok, Can you please let me know your travelling dates?

USER: My travelling dates are 11/04 and 11/06.

ASSISTANT: Do you require any stopovers in your journey?

USER: Yes, I need a stopover.

ASSISTANT: To proceed further, I need to know your good name please?

USER: My name is Nancy Smith.

ASSISTANT: Ok, please wait a moment. let me search a flight for you.

USER: Sure.

ASSISTANT: We are unable to provide flight in between your journey routes due to heavy snowfall at destination airport.

USER: No problem, thank you for the information.

ASSISTANT: Thanks for communicating us, have a nice day.