You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I need to change my reservation as my exams got postponed, can you please help me?

ASSISTANT: Sure, I can help you. May I know your good name please?

USER: I am Gary Jackson.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Thanks for your time, there is no active reservation found in your name to change,.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.