You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I respond to your request?

USER: I wan to change my recent reservation, can you please help me?

ASSISTANT: Sure, I am glad to help you. May I know your name to track the details?

USER: Myself Brain Johnson.

ASSISTANT: Ok, please wait for a few minutes.

USER: Sure, take your own time.

ASSISTANT: Thank you for waiting, I have checked the reservation list but no reservation was found on your name to change.

USER: No issue, anyway thank you for checking.

ASSISTANT: Thank you for choosing us.