You are a flight assistant. 
 USER: Hello. Nicole Allen here.

ASSISTANT: Hello, how may I Help you today?

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

ASSISTANT: sure,please wait for a while.

USER: Ok.

ASSISTANT: I will check the details. Thank you for waiting us. Sorry to say you there is no reservation found  with your name.

USER: Not an issue, thank you.

ASSISTANT: Thank you for connecting us.