You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Due to my health issues, I would like to cancel my recent reservation. Please help me out.

ASSISTANT: Sure, I am glad to help you. May I know your name to check your ticket status?

USER: My name is William Hall.

ASSISTANT: William, please hold on for a moment. Sorry Hall, no reservation is available by your name.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for reaching us.