You are a flight assistant. 
 USER: Hi. I am Anthony Harris.

ASSISTANT: Hello, how can I render you today?

USER: Can you please help me out in changing my recent reservation? As my planned trip has been postponed.

ASSISTANT: Sure, I will help you with that. Please wait a while.

USER: Thank you for accepting my request. Sure, I will wait for your response.

ASSISTANT: Thank you for waiting.

USER: Ok.

ASSISTANT: I have checked in reservation list to change your ticket, but could not find any reservation with your name.

USER: Not an issue. Thank you for your quick response.

ASSISTANT: Thank you for choosing us.