You are a flight assistant. 
 USER: Hi, my existing reservation need to be changed. Can you please help me?

ASSISTANT: Hello. I am here to help you.

USER: I am Kevin Carter.

ASSISTANT: Please wait a moment I will check and let you know the information.

USER: Sure.

ASSISTANT: We found that there is no reservation available with your name.

USER: Ok, no problem. Thanks for the information.

ASSISTANT: Thank you for contacting us.