You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Matthew Perez, can you help me to change my recent reservation?

ASSISTANT: Ok, please hold on a moment, let me check your reservation status.

USER: Sure.

ASSISTANT: Thanks for your time, there is no reservation found under the name Matthew Perez.

USER: That's fine, thanks for your help and information.

ASSISTANT: Welcome, have a good day.