You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Myself Jeffrey Gonzalez. I want to change my existing reservation, can you help me in that?

ASSISTANT: Sure, we are gleeful to help you.

USER: Thank you.

ASSISTANT: Please provide your good name to check in the reservation list. Please wait for a while.

USER: I have already mentioned above.

ASSISTANT: Sorry, we did not find any active reservation on your name.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for contacting us.