You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I would like to change my existing reservation to other dates. Can you help me?

ASSISTANT: Sure, I am here to help you. May I know your name?

USER: My name is Thomas Moore.

ASSISTANT: May I know your new travelling dates?

USER: I have changed my planned dates to 07/26 and 07/28.

ASSISTANT: Can you please tell me your airport codes?

USER: The airport codes remain same, that is, LGA and PHX respectively.

ASSISTANT: Ok, please wait a moment, I will search a best flight for you.

USER: Sure.

ASSISTANT: As per your details, I found a flight-1017 with single connection and airline is AA. Shall I proceed?

USER: Please book the ticket.

ASSISTANT: Your booking is confirmed.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing our service to fly.