You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Please help me with changing my reservation which is with the name Catherine Phillips.

ASSISTANT: Sure, I will aid you for changing the reservation.

USER: Ok.

ASSISTANT: Standby, I will check the existing list to change your reservation.

USER: Ok.

ASSISTANT: Sorry to inform you, that there was no reservation on your name to change.

USER: Fine, thanks for the information.

ASSISTANT: Thank you.