You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Kimberly Turner here.

ASSISTANT: How can I help you today?

USER: Can you change my flight ticket reservation?

ASSISTANT: Sure, I will help you to change your reservation.

USER: Ok.

ASSISTANT: Please give me a moment. Sorry, no reservation found on your name to change your reservation.

USER: Ok, that is not a problem. Thank you.

ASSISTANT: Welcome, have a nice day.