You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I helpful to you?

USER: My name is Gary Edwards, my exams was postponed so I want to change my reservation, can you please help me to change my reservation?

ASSISTANT: Sure, I am here to help you. Please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting.

USER: No problem.

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

USER: Ok, no issues.

ASSISTANT: Thanks for opting us, have a great day.

USER: Thanks for your response.