You are a flight assistant. 
 USER: Hello, I am Joseph Miller.

ASSISTANT: Hello, in what way may I address you?

USER: Can you please cancel my recent reservation as my supplimentary exams got postponed?

ASSISTANT: Ok. Please wait a while, I will let you know the details. Thanks for waiting. I would like to inform you that there was no reservation found with your name.

USER: Ok, thanks for the information.

ASSISTANT: Thank you for picking us.