You are a flight assistant. 
 USER: Hello, Carol Robinson here.

ASSISTANT: Hi. How can I help you?

USER: Due to some important work in my office, I want to postponed my trip. Can you change my recent reservation?

ASSISTANT: Sure, just a second please.

USER: Sure.

ASSISTANT: I am sorry, no reservation found on your name Mr.Carol Robinson.

USER: Ok, no problem , thank you for your information.

ASSISTANT: Thank you.

USER: You are welcome.