You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I support you today?

USER: I would like to change my existing reservation which was made on the name of Kenneth Thomas. Can you help me update my reservation?

ASSISTANT: Sure, please wait a moment I will check the reservation status.

USER: Sure.

ASSISTANT: Thanks for waiting, we did not found any reservation list by this name.

USER: That's fine. Thank you for the response.

ASSISTANT: Thank you for opting us.