You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Sharon Martin.

ASSISTANT: How can I provide service to you?

USER: I want to cancel my reservation due to an sudden health issue. Help me for cancellation my ticket.

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for your time. There was no reservation found on your name.

USER: Thank you for informing.

ASSISTANT: Thank you for reaching us.