You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I am Kenneth Hernandez. I want to change my existing reservation, due to my office work place have been changed. Can you help me out?

ASSISTANT: Ok, please wait while I check the records.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no reservation been found on your name.

USER: Ok, not an issue. Thank you for your kind information.

ASSISTANT: Thank you for choosing our agency.