You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: I am Janet Baker. As my semester exams got postponed, Can you please change my reservation?

ASSISTANT: Sure, we will help you. Please give me sometime to check the details.

USER: Sure.

ASSISTANT: Sorry to inform you that there is no reservation exist on your name to change.

USER: No problem. Thank you.

ASSISTANT: Thank you for consulting us.