You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I want to cancel my recent reservation because my friend have booked the ticket already.

ASSISTANT: Ok, may I know your name to check for the previous reservation in our data base?

USER: My name is Anthony Evans.

ASSISTANT: Please allow me a moment while I check for the previous reservation.

USER: Sure, take your own time.

ASSISTANT: Your patience is greatly appreciated. Anthony, there is no reservation found under your name.

USER: It's ok, no problem. Thank you for your service.

ASSISTANT: You are welcome. Thank you for contacting us.