You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Due to sudden changes, my exams has been postponed. Can you please change my reservation?

ASSISTANT: Sure, may I know your name?

USER: Donna Scott here.

ASSISTANT: Wait a minute.

USER: Ok.

ASSISTANT: There was no reservation found on your name.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for choosing us.