You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Can you help me to change my recent reservation?

ASSISTANT: Sure, I will help you with that. May I know your good name?

USER: Thank you. My name is Jeffrey Hall.

ASSISTANT: Please wait for a moment, while I check for the reservation on your name.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is no reservation found on your name in our system data to change it.

USER: That's ok, thank you.

ASSISTANT: Thank you visiting us, we hope see you again.