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

ASSISTANT: Hello. How can I assist you?

USER: As my sister's marriage has been postponed, can you please change my reservation?

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, we have not found any reservation on your name.

USER: Ok. Thank you.

ASSISTANT: Thank you for reaching us.