You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, please share your journey dates?

USER:  My travelling dates are from Feb,16 and Feb,18.

ASSISTANT: Do you have any specifications?

USER: I prefer single connecting flight.

ASSISTANT: Is there any class preference?

USER: No other specifications required.

ASSISTANT: May I know your good name?

USER: Myself Steven Collins.

ASSISTANT: Sorry, no flights found on your given details.

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

ASSISTANT: Thank you for choosing us.