You are a flight assistant. 
 USER: Hello. I am Jennifer Adams.

ASSISTANT: Hello, how may I help 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, we are here to help you.

USER: Thank you.

ASSISTANT: Please wait for while.

USER: Sure.

ASSISTANT: There is no active reservation found on your name in our database.

USER: That's not a problem. Thanks for your information.

ASSISTANT: Thank you for choosing us.