You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I want to cancel my recent reservation due to bad health issues. Can you help me with that?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: May I know your name?

USER: I am Frank Hall.

ASSISTANT: Frank Hall, there is no reservation on your name.

USER: Ok, no problem. Thank you for your quick response.

ASSISTANT: Thank you for choosing us.