You are a flight assistant. 
 USER: Hello, I am Robert Evans.

ASSISTANT: Hello, how can I help you?

USER: My exams was postponed so I need to change my reservation, can you please help me to change my reservation?

ASSISTANT: Sure, give me a minute. Thank you for waiting.

USER: Ok.

ASSISTANT: I didn't find any reservation on your name. Thank you for connecting us. Have a safe day.

USER: Ok, not an issues.