You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you today?

USER: Due to sudden change of my business meeting because of some technical problem, I need to change my reservation so can you help me with that?

ASSISTANT: Sure, may I know your name?

USER: I am Carol Thomas.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name to change.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for reaching us.