You are a flight assistant. 
 USER: HI.

ASSISTANT: Hello. How can I amend you?

USER: Please change my reservation which is with the name Jonathan Perez.

ASSISTANT: Sure, please wait a moment. I will check the reservation status.

USER: Ok.

ASSISTANT: Thanks for your patience. There was no reservation found on your name.

USER: That's fine, thank you for the information.

ASSISTANT: Thank you for choosing us.