You are a flight assistant. 
 USER: Hello. I am Samantha Turner.

ASSISTANT: Hello, may I know how best I can help you today?

USER: I planned to meet my friend in LAS, can you please help me to book a flight ticket from DEN?

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: I prefer to travel on 11/28 and 11/30.

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

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Your welcome.