You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I am Shirley Clark. I want to change my reservation, as my plan to meet my father is postponed. Can you help me with that?

ASSISTANT: Sure, we are here to help you to change it? Please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, there was no reservation found on your name.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for choosing us.