You are a flight assistant. 
 USER: Hello. My name is Rachel Moore.

ASSISTANT: Hello. How can I help you?

USER: Actually, I booked a ticket to attend a concert in BOS but due to bad weather, I want to postpone my reservation.

ASSISTANT: Ok, so would you like me to change your existing reservation?

USER: Yes.

ASSISTANT: Ok, can you please provide your new travelling dates?

USER: My preferable dates are from 12/20 to 12/22.

ASSISTANT: Ok Rachel, please let me know the airport codes?

USER: My airport codes are IAH and BOS respectively.

ASSISTANT: I found a flight 1017 of Hawaiian airlines, shall I book it for you?

USER: Please proceed with the booking.

ASSISTANT: Ok, your ticket is booked.

USER: Thank you for your time.

ASSISTANT: Thank you, have a great trip.