You are a flight assistant. 
 USER: Hi. I am David Smith.

ASSISTANT: Hello, How exactly I can serve you the best today?

USER: I need to book a flight ticket from DTW to JFK, Can you please help me for booking?

ASSISTANT: Sure, we are rapturous to help you.

USER: Thank you.

ASSISTANT: May I know your itinerary dates?

USER: My travelling dates are from 08/21 and return date on 08/23.

ASSISTANT: Do you need any halt in your journey?

USER: I am comfortable with any connection.

ASSISTANT: Would you like to prefer business class or economy class?

USER: I am prefer with business class.

ASSISTANT: What are your preferable timings to travel?

USER: My departure time is Morning 3 AM to 11 AM.

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, not an issue. Thanks for your quick response.

ASSISTANT: Thank you for reaching us, we hope to serve you for the next time.