You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

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

ASSISTANT: Sure, I can help you with that. May I know your good name please?

USER: Janet Parker here.

ASSISTANT: Ok, please let me check your reservation status.

USER: Sure.

ASSISTANT: Janet Parker, there is no active reservation found under your name to do changes in that.

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

ASSISTANT: Thank you for choosing us.