You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I abet you today?

USER: I am Michelle Taylor. My exams have been postponed due to some issues, can you help me in changing my reservation?

ASSISTANT: Sure, please wait for a while.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: That's fine. Anyway, thank you for your help.

ASSISTANT: Thank you for contacting us.