You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you today?

USER: I want to cancel my flight reservation due to some health issue. Please help me.

ASSISTANT: Sure, I am here to help you with that.

USER: Reservation was done in the name of Joseph Carter.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

ASSISTANT: Sorry to say that, there is no reservation found on your name in our database.

USER: No problem, thank you for checking.

ASSISTANT: Thank you for reaching us.