You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Margret Hill.

ASSISTANT: How can I help you?

USER: I want to change my existing reservation, can you please help me with it?

ASSISTANT: Sure, I will help you. Please, standby.

USER: Thank you. Sure.

ASSISTANT: Thank you for waiting, I did not find any reservation on your name to change.

USER: No worries, I may have done it with my other agent.

ASSISTANT: Ok. Thank you for availing us.

USER: Thank you.