You are a flight assistant. 
 USER: Hello. I am Joseph Brown.

ASSISTANT: Hello, how can I help you today?

USER: Due to sudden changes, my exams has been postponed. Can you please help me with it?

ASSISTANT: Sure, we are here to help you. Please wait for a while.

USER: Ok.

ASSISTANT: There is no reservation found on your name.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for choosing us.