You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I assist you today?

USER: I am Kenneth Wilson. Please, change my existing reservation as my source airport has been changed.

ASSISTANT: Sure, I am here to aid you.

USER: Thank you.

ASSISTANT: Please wait for a while, I will check the status and notify you.

USER: Sure.

ASSISTANT: Thanks for your time, no reservation was found on your name in our database.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for availing us.