You are a flight assistant. 
 USER: Hello. I am Eric Lee.

ASSISTANT: Hello, how can I serve you today?

USER: I want to cancel my reservation, due to my health issues. Could you help me in the cancellation?

ASSISTANT: Sure, I will help you with cancellation. Please wait for a while and let me check the reservation.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is no reservation found on your name in our system data.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for visiting us.