You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Pamela Phillips here. Due to some reason, I want to alter my reservation.

ASSISTANT: Sure, I will help you out in changing the ticket.

USER: Thanks.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Your reservation found. Can you please provide me your travelling dates please?

USER: My new travelling dates are from 12/31 to 01/02.

ASSISTANT: May I know your airport codes please?

USER: My airport codes are from DTW to PHX.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: There is a flight with flight number 1008, can I proceed with this flight?

USER: Please proceed it.

ASSISTANT: Ok, your ticket has been booked. Thank you for choosing our services.