You are a flight assistant. 
 USER: Hi. Myself Katherine Lopez.

ASSISTANT: Katherine, how may I aid you?

USER: If you find the reservation on my name, please change the dates of my journey.

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry Lopez, there is no reservation is found as per your name to change.

USER: It's fine. Thank you for the information.

ASSISTANT: You are welcome.