You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Janet Perez.

ASSISTANT: How best can I guide you from my end?

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: Please hold a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, there are no reservation found on the given name.

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

ASSISTANT: Thank you.