You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Helen Walker. I want to book a flight ticket from EWR to SEA, so please help me in booking a flight ticket.

ASSISTANT: Sure, may I know your trip dates please?

USER: I would like to fly on Dec 12 and return on Dec 14.

ASSISTANT: Do you have any class preference?

USER: I am comfortable with any class.

ASSISTANT: Thank you for waiting and we have found a flight in economy class with 1 connection in Delta airlines and the fare of your flight will be 100. Do you like me to proceed your booking with this flight?

USER: Make sure that, my departure time is afternoon.

ASSISTANT: Ok, if you want departure time as afternoon, there is another flight available in Hawaiian airlines with price 200.Shall I proceed?

USER: You can proceed to booking.

ASSISTANT: Ok, your ticket is booked with the flight number 1028.

USER: Thank you for your service.

ASSISTANT: Most welcome.