You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: Please book my ticket from BOS to OAK.

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: My trip dates are Dec 28 and Dec 30.

ASSISTANT: Do you need any specifications?

USER: I prefer normal-cost airlines.

ASSISTANT: Can I know your preferences?

USER: I need a connecting flight.

ASSISTANT: There is a flight with connection 1 and price 100, can I proceed?

USER: Please proceed.

ASSISTANT: Ok, your ticket has been booked with flight number 1012.

USER: Thank you.

ASSISTANT: Thank you for reaching us.