You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I want to change my recent reservation. Can you help me out?

ASSISTANT: Sure, I am gleeful to help you with that changing reservation. May I know your name for checking your previous reservation status?

USER: I am Ruth Anderson.

ASSISTANT: Please wait for a while.

USER: Ok, take your time.

ASSISTANT: Thank you for waiting, but I am sorry to say that, there is no active reservation found on your name in our database to change it.

USER: That's ok. Anyways, thank you.

ASSISTANT: Most welcome, thank you for reaching us. Have a great day.