You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Due to sudden work, I want to change my reservation. Can you please help me with it?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Can I know your name to search your reservation?

USER: Kenneth Wright here.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: We are regret to inform you that, there is no active reservation on your name in our records.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for reaching us, have a great day.