You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Nancy Williams here. I would like to visit Austin to meet my best friend, can you help me to book a flight ticket from MSP to AUS?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My travelling dates are 23 and 25 of Nov.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Is there any class preference for you?

USER: No, I would like to depart in the afternoon.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: It's ok, not a problem, thank you.

ASSISTANT: Thank you for reaching us.