You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I need to cancel my recent reservation due to some health issues, can you help me in doing that?

ASSISTANT: I am sorry to know that. I will help you. Please help me with your name.

USER: I am Charles Turner.

ASSISTANT: Please allow me a minute.

USER: Sure, take your time.

ASSISTANT: Charles Turner, I am really sorry to inform you that there is no booking found on your name to cancel.

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

ASSISTANT: Thank you for reaching us. Have a great time.