You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I'm Michael Rodriguez.

ASSISTANT: Ok.

USER: My scheduled examination dates has been postponed. So, I would like to change my existing reservation which is under my name. Can you please help me with that?

ASSISTANT: Please wait for a while. No reservation is found by name Michael Rodriguez.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thanks.