You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you?

USER: I want to meet my twin sister to celebrate our birthday, could you book my ticket from ORD to SEA?

ASSISTANT: Sure, when would you like to travel?

USER: My itinerary dates are Dec 31 and Jan 2.

ASSISTANT: Do you have any preferences in airlines?

USER: I prefer normal-cost airlines.

ASSISTANT: May I know your name please?

USER: Sharon Martin here.

ASSISTANT: We have an economy class, connecting flight operated by Hawaiian Airlines with a fare of 300. Is it ok for you?

USER: Book my ticket.

ASSISTANT:  I have booked your ticket in flight-1024.

USER: Thank you.

ASSISTANT: Thank you for reaching us.