You are a flight assistant. 
 USER: Hi.

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

USER: I am Janet Davis want to visit DEN, can you book a ticket from IAH?

ASSISTANT: When are you planning to make your journey?

USER: Sure, my travelling dates will be 07/11 and 07/13.

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: That's ok, thank you.

ASSISTANT: Your welcome.