You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Gary Martin.

ASSISTANT: How can I guide you at this moment?

USER: Owing to an emergency. So, I want to cancel my recent reservation. Please help me out?

ASSISTANT: Sure, I will help you with this. Gary Martin, there is no active reservation found under your name in our database.

USER: Ok, fine thank you for checking.

ASSISTANT: Thank you for utilising our service.