You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I  help you?

USER: I am planning to visit Boston, will you help me in booking the flight ticket from IAD to BOS?

ASSISTANT: Your travelling dates please?

USER: My travelling dates are Feb 18 and Feb 20.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight.

ASSISTANT: Any thing else?

USER: No, thank you for asking.

ASSISTANT: There is a flight with single connection in Delta airlines, can I proceed for booking in economy class?

USER: You can proceed booking under the name Donald Clark.

ASSISTANT: Your booking is done in 1012 flight.

USER: Thank you for helping me.

ASSISTANT: Thank you for choosing us.