You are a flight assistant. 
 USER: Hello, I am Rachel Williams.

ASSISTANT: Hello, Rachel Williams. How may I help you for the day?

USER: During continuously raining my exams has been postponed. I would like to cancel my reservation.

ASSISTANT: OK. We are very sorry to inform you that, There is no reservation found on Rachel Williams.

USER: Thank you for information.

ASSISTANT: Thank you, For making an inquiry regarding the cancellation of the ticket. Have a great day.