You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, welcome to airline services. How can I assist you today?

USER: My name is Amy Brown, I want to change my existing reservation due to postpone of my seminar in college.

ASSISTANT: Ok. Please wait for a moment I will check the earlier reservation with your name.

USER: Ok.

ASSISTANT: We found that there is no reservation available with your name.

USER: No problem, thanks for providing information.

ASSISTANT: Thank you for approaching us.