You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello.

USER: I am Kenneth Perez.

ASSISTANT: How can I help you today?

USER: I want to change my reservation, due to postpone of my seminar. Can you help me with that?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry  Kenneth Perez, no reservation found on your name in our data list.

USER: Ok, not an issue. Thanks for your help and support.

ASSISTANT: Thank you for reaching us, have a great day.