You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: Due to some entrepreneurship meeting, I am going to change my existing reservation. Can you help me?

ASSISTANT: Sure, I will help you. May I know your name?

USER: Timothy Hill here.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Thanks for waiting. There is no reservation on your name.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you.