You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can 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, please wait a moment.

USER: Sure.

ASSISTANT: May I know your name?

USER: I am Charles Taylor.

ASSISTANT: Sorry to say, no reservation found with your name.

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

ASSISTANT: Thanks for reaching us.