You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: I want to book a flight ticket from IAD to MSP. Could you help me in booking?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are from Oct 29-31.

ASSISTANT: May I know your name?

USER: I need 1 connecting flight. Kevin Anderson here.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Sorry, there are no flight tickets available on your route.

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you for choosing our service.