You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

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

ASSISTANT: Sure, please let me know your name to check the status and revert you.

USER: My name is Gary White.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found by your name in our data base.

USER: Ok, not a problem.

ASSISTANT: Thank you for opting us.

USER: Thank you for information.