You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Virginia Collins.

ASSISTANT: How may I aid you today?

USER: I want to change my reservation as my farewell party got postponed. Can you help me in changing?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Please standby.

USER: Sure.

ASSISTANT: Thank you for your time. Sorry, we do not found any reservation in your name.

USER: It's Ok, thanks for your assistance.

ASSISTANT: Thank you for opting us.