You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: I want to change my existing reservation which is done recently due to some problems, can you please help me?

ASSISTANT: Sure, I am glad to help you in amending your reservation.

USER: Thank you.

ASSISTANT: Please allow me a moment to check for your reservation status is active or not. Please provide me the name to check for the status.

USER: Sure, I am Laura Thomas here.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

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

USER: Ok, no problem. Thank you for your service.

ASSISTANT: Thank you for reaching us.