You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: Can you please help me in changing my reservation?

ASSISTANT: Sure, may I know your name?

USER: My name is Andrew Miller.

ASSISTANT: Please wait a moment.

USER: Sure.

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

USER: Ok No issues. Thank you.

ASSISTANT: Thank you for reaching our service.