You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to change my reservation, can you help me that?

ASSISTANT: Sure, I will help you. May I know your good name to check the reservation list? Please wait a moment. I will check and let you know.

USER: Every on called my name is Timothy Martinez. Ok. I wail wait.

ASSISTANT: Thanks for your patience. Sorry to inform you that there was no reservation found on your name.

USER: Ok, not a problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you.