You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Ashley Allen here, due to sudden changes my exams has been preponed. Can you please help me to change my reservation?

ASSISTANT: Sure, please hold on a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, no flight reservation found with your name.

USER: Not a problem, thank you.

ASSISTANT: Thank you for opting us.