You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I amend you?

USER: My name is Ryan Anderson.

ASSISTANT: Yes Ryan.

USER: Due to some personal problems, I would like to postpone my trip. Can you help me in changing my existing reservation?

ASSISTANT: Sure, I will help you, please hold on for a moment to check your reservation status.

USER: Ok.

ASSISTANT: Ryan, I did not find any reservation with your name in my database. Thank you for reaching us.

USER: Its ok, thank you for the information.