You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I assist you now?

USER: I want to change my existing reservation.

ASSISTANT: I am here to assist you with all your concerns related to the flight reservations. May I know your good name to check with your previous booking?

USER: Eric Scott here.

ASSISTANT: Ok, please be on hold for a moment Eric.

USER: Sure.

ASSISTANT: Sorry to tell you, there is no active reservation found by your name.

USER: Ok, no issues.

ASSISTANT: Thank you for connecting with our services.

USER: Thanks for your help.

ASSISTANT: Have a great day ahead.