You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I oblige you today?

USER: I am planning to change my existing reservation. Can you please help me for this?

ASSISTANT: Sure, may I know your good name?

USER: Myself Pamela White.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no active reservation found on your name.

USER: Not a big problem, anyhow thank you very much for your kind information.

ASSISTANT: Thank you for opting us.