You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: I am Matthew Perez here. I need to cancel my existing reservation, which is done recently. Can you please help me out?

ASSISTANT: Please wait a moment, let me check with your details.

USER: Thank you for considering my request.

ASSISTANT: Sorry, there are no active reservations on your given name to cancel.

USER: Not a big problem. Thank you for the information.

ASSISTANT: Thank you reaching our service.

USER: Thank you for  your service.