You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Can you please book a flight ticket from ATL to MSP?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are May 11 and May 13.

ASSISTANT: Can I know your other preferences?

USER: I need a connecting flight.

ASSISTANT: May I know your name?

USER: My name is Steven Green.

ASSISTANT: Wait a minute.

USER: Ok.

ASSISTANT: Sorry, there are no flights available on your travelling dates.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for choosing us.