You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I need to reserve a from DEN to JFK, can you help me in doing that?

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

USER: My trip dates are Sep 21 to 23.

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

USER: I need a connecting flight. I am Lisa William.

ASSISTANT: Do you have any other requirements?

USER: Please ensure that my return time is in afternoon.

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

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for choosing us.