You are a flight assistant. 
 USER: Hello, I am Helen Martinez.

ASSISTANT: Hello. How may I help you out?

USER: I am planning to celebrate my birthday in Boston, so please book a flight ticket from EWR to BOS.

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

USER: I want to fly on Mar 10, return on Mar 12.

ASSISTANT: Do you need any specifications?

USER: My return time should be afternoon.

ASSISTANT: Can I know your preferences?

USER: I want direct flight.

ASSISTANT: There is a flight with connection 0 and price 200, can I proceed?

USER: May I know the return time?

ASSISTANT: Return time at 18:00 P.M.

USER: Ok, proceed to booking.

ASSISTANT: Ok, your ticket has been booked with flight number 1020.

USER: Thank you.

ASSISTANT: Thank you for reaching us.