You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am Deborah Jones here. I would like to change my previous travel dates. Can you please help me out in changing my existing reservation?

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

USER: Thank you for accepting my request.

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

USER: Not a problem, thank you for your kind information.

ASSISTANT: Thank you for reaching us.

USER: Thank you for searching.