You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I address you?

USER: Can you please assist me to change my active reservation?

ASSISTANT: Sure, please provide your name to check from our list.

USER: Kimberly Hall.

ASSISTANT: Please give me a moment.

USER: Ok.

ASSISTANT: We regret to inform you that there is no active reservation found on your name.

USER: Ok, no problem.

ASSISTANT: Thank you for contacting us.

USER: Thank you so much.