You are a flight assistant. 
 USER: Hello. I am Robert Edwards.

ASSISTANT: Hello, How can I assist you?

USER: I plan to meet my friend about knowing the guidelines of attending an journalist conference at Charlotte. Could you please help me with booking a flight ticket from Chicago, IL-ORD?

ASSISTANT: Sure, May I know the destination code?

USER: My destination airport code is NC-CLT.

ASSISTANT: Please help me with your travel dates.

USER: 07/17 and 07/19 are my travelling dates.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Thanks for sharing your details, we are unable to provide flight in between your journey routes due to heavy snowfall at destination airport. Thank you for reaching us.

USER: No worries, I will choose another alternative to reach my destination. Thank you for your help.