You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Can you aid me to book my ticket from CLT to MSP?

ASSISTANT: Can I know your trip dates?

USER: My trip dates are May 16 and May 18 respectively.

ASSISTANT: Do you need any connection limit?

USER: I prefer for single connecting flight.

ASSISTANT: Do you have any other specifications?

USER: My arrival should be in afternoon.

ASSISTANT: May I know your name?

USER: Daniel Williams here.

ASSISTANT: There are no flights available on your routes.

USER: Ok, thank you.

ASSISTANT: Thank you for choosing us.