Hello. Nicole Allen here.
user
Hello, how may I Help you today?
assistant
Due to sudden changes, my exams has been postponed. can you please help me to change my reservation?
user
sure,please wait for a while.
assistant
Ok.
user
I will check the details. Thank you for waiting us. Sorry to say you there is no reservation found  with your name.
assistant
Not an issue, thank you.
user
Thank you for connecting us.
assistant