You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am looking for a flight from BOS to IAD, can you please help me in booking?

ASSISTANT: Sure, can I have your travel dates?

USER: My travelling dates are Apr 22 and Apr 24.

ASSISTANT: Do you need a stopover?

USER: I need a connecting flight.

ASSISTANT: May I know your good name please?

USER: My name is Raymond Moore.

ASSISTANT: Do you have any other requirements to be met?

USER: I want to return in afternoon.

ASSISTANT: Sorry, there is no flight on your required dates.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for choosing us.