You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am planning to book a flight ticket to MSP from IAD, can you please help me out?

ASSISTANT: Sure, I am here to help you in booking. Can you please share your travel dates?

USER: Sure, my planned travelling dates are Nov 23 and Nov 25.

ASSISTANT: Ok, please mention your name.

USER: Sure, my name is Betty Smith.

ASSISTANT: May I know your connection limit?

USER: I am looking for a flight with 1 connection.

ASSISTANT: Do you have any specification?

USER: I prefer business class. My depart time must be in morning.

ASSISTANT: Sorry, no flights are available on your preferable travel dates.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for choosing us, have a nice day.