You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: I am Raymond Hill. I want to change my existing reservation due to board exams. Can you help me in this?

ASSISTANT: Sure, please allow me a moment to check for the status.

USER: Ok.

ASSISTANT: Thank you for waiting. Here, there is no active reservation have been found under your name in our database to amend it.

USER: Ok.

ASSISTANT: Thank you for reaching us.

USER: Thank you.