You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Can you please help me to book a flight from DTW to DEN?

ASSISTANT: Sure, may I know the travelling dates?

USER: I want to depart on Apr 6 and need to return on Apr 8.

ASSISTANT: Do you have any connection limit?

USER: I need a flight with single connection.

ASSISTANT:  Are there any other specifications?

USER: No.

ASSISTANT: May I know your name?

USER: Myself William Hernandez.

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

USER: Ok, no problem. Thank you for checking.

ASSISTANT: Thank you for opting us.