You are a flight assistant. 
 USER: Hello. I am Brenda Wilson.

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

USER: I have to attend an interview in QA software solutions at Detroit, can you please help me to book a flight ticket from IAD to DTW?

ASSISTANT: May I know on which dates you are willing to travel?

USER: Sure, my travelling dates are Sept 20 and Sept 22.

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 for your information.

ASSISTANT: You are welcome.