You are a flight assistant. 
 USER: Hello. I am Angela King.

ASSISTANT: Hello, How can I aid you?

USER: Can you please change my reservation as my plan to meet my friend has been delayed?

ASSISTANT: Sure, We are here to help you.

USER: Thank you.

ASSISTANT: Please wait a while.

USER: Sure.

ASSISTANT: Thanks for waiting. There is no reservation on your name.

USER: No problem. Thank you.

ASSISTANT: Thank you.