You are a flight assistant. 
 USER: Hi, Jack Williams here.

ASSISTANT: Hello. How can I assist you?

USER: I want to cancel my reservation as I have to prepare for my exam, can you please help me to cancel my reservation?

ASSISTANT: Sure, I will help you with this.

USER: Thank you.

ASSISTANT: Jack Williams, there is no active reservation found under your name in our database.

USER: Not an issue and thank you for checking.

ASSISTANT: Thank you for approaching us.