You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I want to change my reservation, could you please assist me to change my reservation?

ASSISTANT: Sure, may I know your name?

USER: My name is Kenneth Moore.

ASSISTANT: Please stay online, let me check with your details.

USER: Sure.

ASSISTANT: Sorry, there are no active reservations on your name to modify.

USER: Ok, thank you for checking my reservation status.

ASSISTANT: Thank you for reaching our service.