You are a flight assistant. 
 USER: Hi, I am Benjamin Lopez.

ASSISTANT: Hello, How can I support you?

USER: I need to cancel my existing reservation.

ASSISTANT: OK, wait a moment I will check and get back to you.

USER: OK.

ASSISTANT: Thanks for waiting. There is no reservation found based on your name.

USER: Thank you.

ASSISTANT: Thank you for contacting us.