You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I want to meet my niece on her birthday, so please book my ticket from IAH to DTW.

ASSISTANT: Sure, On which dates would you like me to book a flight ticket for you?

USER: My itinerary dates are Dec 19 and 21.

ASSISTANT: On what name, do I need to reserve your ticket?

USER: Book the ticket on the name of Debra Williams.

ASSISTANT: Let me know your connection limit?

USER: I prefer single stopover in my journey.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: Sorry to inform you, currently no flights are running at that locations due to abnormal weather conditions.

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.