You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am George Clark.

ASSISTANT: How can I aid you?

USER: I am planning to cancel my recent reservation, due to health issue. Can you please cancel my ticket?

ASSISTANT: Sure, I am here to help you. Please, wait for a while.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: That' s fine, thank you for your service.

ASSISTANT: Thank you for reaching us.