You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you?

USER: I am Ruth Parker, want to alter my recent reservation due to some emergency. Please help me out with that.

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry to inform you that there is no active reservation found on your name in our records.

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

ASSISTANT: Thank you.