You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: As my meeting got postponed, can you please help me in changing my existing reservation?

ASSISTANT: Sure, I'll help you in that. May I know your good name please?

USER: My name is Christine Evans.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: There is no reservation found under your name to do changes in that.

USER: Ok, not an issue. May be something went wrong while booking the ticket. Thank you for providing information.

ASSISTANT: Thank you for choosing us.