You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am James Roberts.

ASSISTANT: How may I help you?

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

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation matching with your name in our portal.

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

ASSISTANT: Thank you for reaching us.