You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Please reserve me a flight ticket from OAK to BOS.

ASSISTANT: Can I know your travelling dates?

USER: My trip dates are Apr 18 and Apr 20.

ASSISTANT: Do you prefer a connecting flight?

USER: I prefer connecting flight.

ASSISTANT: May I know your name?

USER: I am Carolyn Gonzalez.

ASSISTANT: Do you have any other specifications?

USER: I would like to depart in the afternoon time.

ASSISTANT: There is a flight of American airline, flight number 1012 with the fare of 800.

USER: Please proceed to book my flight ticket in this airlines.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for choosing us.