You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Due to health issues, I need to cancel my recent reservation. Please help me with that.

ASSISTANT: Sure, may I know your name?

USER: I am Robert Perez.

ASSISTANT: Sorry, there was no reservation found on your name.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for choosing us.