You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: Will you be my helping hand in changing my reservation as the semester exams which I want to attend got postponed?

ASSISTANT: Sure, can I have your name please?

USER: I am Gary Hernandez.

ASSISTANT: There is no reservation found with your name.

USER: It's ok, thank you for your information.

ASSISTANT: Have a good day.