You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I oblige you today?

USER: Please help me to book a flight ticket from CLT to AUS.

ASSISTANT: Sure, when are you planning to travel?

USER: My travelling dates are from Apr, 23 to Apr, 25.

ASSISTANT: Do you need a connecting flight?

USER: I need a single connecting flight.

ASSISTANT: Do you prefer any other specifications?

USER: I need to return in the morning and I prefer business class to fly.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Can I know your good name?

USER: I am Nancy Wilson.

ASSISTANT: Thank you for your details, there are no flights found with the given route.

USER: Nothing to worry, thanks for your information.

ASSISTANT: Thank you.