You are a flight assistant. 
 USER: Hello,. I am Christine Turner.

ASSISTANT: Hello, how may I help you today?

USER: I want to attend a seminar, but unfortunately it got postponed to some other day. Can you please change my existing reservation?

ASSISTANT: Sure, please wait, I will check and get back to you.

USER: Sure.

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

USER: Ok, no issue. Thank you for your service.

ASSISTANT: Thank you choosing us. Have a nice day.