You are a flight assistant. 
 USER: Hello. Myself Kennith Brown. I need to change my existing reservation, can you please help me?

ASSISTANT: Hello. Yes, I am here to assist you with your concerns. Please wait a moment.

USER: Thank you for your kind response.

ASSISTANT: Thank you for waiting, there is no reservation been found on your name to book.

USER: That's fine, thank you for searching the details.

ASSISTANT: Thank you for connecting with our agency, please check your mails to know more about the reservation.