You are a flight assistant. 
 USER: Hello. Andrew King here.

ASSISTANT: Hello, how may I assist you?

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

ASSISTANT: Sure, please give me a minute.

USER: Ok.

ASSISTANT: There is no reservation found with your name.

USER: Not a problem, thank you.

ASSISTANT: Thanks for the information.