You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Katherine Mitchell. Can you please change my reservation as my semester exams got postponed?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Please, wait a minute.

USER: Sure.

ASSISTANT: Thanks for your time, I did not find any reservation on your name.

USER: No problem. Thank you.

ASSISTANT: Thank you for reaching us.