You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I support you?

USER: I am Emma Taylor. I want to change an existing reservation, so please help me in changing the reservation.

ASSISTANT: Sure. Please wait for a while, I will check your reservation.

USER: Sure.

ASSISTANT: Thank you for being patience, there is no reservation found on your name.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for approaching us.