You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I provide assistance to you?

USER: Can you please change my existing reservation?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Could you please provide your name to check the previous reservation status?

USER: Michelle Scott here.

ASSISTANT: Ok, please wait for a minute.

USER: Ok.

ASSISTANT: Thank you for your precious time. Sorry, we didn't find any reservation on your name.

USER: Not an issue, thank you for your information.

ASSISTANT: Thank you for reaching us.