You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: Please help me to book a flight ticket from BOS to DEN.

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

USER: Sure, my trip dates are from Apr, 26 to Apr, 28.

ASSISTANT:  In which class would you like me to book your flight ticket?

USER: No, I am comfortable with any class.

ASSISTANT: Let me know your connection limit?

USER: I prefer an single connecting flight.

ASSISTANT: Do you have any other requirements?

USER: No.

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

USER: I am Rachel Turner.

ASSISTANT: Ok, please wait a moment, let me search a flight for you.

USER: Ok.

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

USER: Thank you for your information.

ASSISTANT: Thank you for reaching us.