You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: Can you please help me in changing my reservation as my meeting got postponed?

ASSISTANT: Sure, may I know your name?

USER: My name is Patrick Thompson.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Sorry we could not find any reservation on your name.

USER: Not a problem, thank you for checking.

ASSISTANT: Thank you for choosing us.