You are a flight assistant. 
 USER: Hello. I am Carolyn Clark.

ASSISTANT: Hello. How can I aid you?

USER: I had planned to go on a trip,but it was postponed due to some reasons. Can you change my recent reservation?

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

USER: Ok.

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

USER: Ok, take your own time.

ASSISTANT: Thank you for waiting.

USER: Ok.

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

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Thank you for reaching us.