You are a flight assistant. 
 USER: Hello, I am Cynthia Allen.

ASSISTANT: Hello, how can I support you?

USER: Due to some health issue, I want to change my existing reservation.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say that, no reservation was found with your name.

USER: Thank you for providing information.

ASSISTANT: Thank you, for connecting with us.