You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I would like to change my existing reservation. Can you please help me out?

ASSISTANT: Sure, I am here to help you. May I know your name to proceed further?

USER: My name is Janet Harris.

ASSISTANT: Janet Harris, regret to inform that there is no active reservation found under your name to amend.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for connecting with us.