You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: I want to change my reservation, can you help me with that?

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

USER: Jacob Martin here.

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

USER: That's ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.