You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, How may I help you now?

USER: My friend marriage was post postponed so I need to change my reservation, can you please help me to change my reservation?

ASSISTANT: Sure, May I know your name please?

USER: I am Pamela Mitchell.

ASSISTANT: Thanks for providing your name. Please hold on for a moment.

USER: Sure.

ASSISTANT: Unfortunately, there is no reservation found with your name.

USER: Thanks for the information.

ASSISTANT: Thanks for availing us.