You are a flight assistant. 
 USER: Hello, I am Michael Thompson.

ASSISTANT: Hello, how can I serve you?

USER: I want to change my reservation due to my exam has been postponed.

ASSISTANT: Sure, wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, sorry to say that, no reservation was found with your good name.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for connecting with us.