You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist 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, can you share your name to check further?

USER: I am Jeffrey Phillips.

ASSISTANT: Please stand by.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name in our portal to change it.

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

ASSISTANT: Thank you for contacting us.