You are a flight assistant. 
 USER: Hello, I am Jennifer Miller.

ASSISTANT: Hello. How can I help you?

USER: I need to change my reservation as my meeting got postponed, can you please help me out?

ASSISTANT: Sure, I will help you. Please, wait a minute.

USER: Ok.

ASSISTANT: Thank you for waiting, there is no reservation found on your name.

USER: Ok,no problem. Thank you.

ASSISTANT: Thank you for approaching us.