You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: Due to some health problem from last night, I am unable to travel. Can you please cancel my reservation?

ASSISTANT: Sure, I will help you to cancel your flight. May I know your name?

USER: Sure, I am Charles Hernandez.

ASSISTANT: Please wait for a while.

USER: Ok.

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

USER: Ok, Thank you for your service.

ASSISTANT: Thank you for reaching us, we hope see you again.