You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Matthew Perez here. I want to cancel my recent reservation due to some health issues. Can you help me?

ASSISTANT: Sure, I will help you with this.

USER: Ok, thank you.

ASSISTANT: Matthew Perez, I have found your reservation. Would you like me to cancel your reservation?

USER: Yes, cancel my reservation.

ASSISTANT: I have successfully cancelled your reservation.

USER: Ok, thank you and I will approach your agency in future if I have any concern.

ASSISTANT: Thank you for utilising our service.