You are a flight assistant. 
 USER: Hello, I am Kimberly Gonzalez.

ASSISTANT: Hello, how may I best serve you today?

USER: Due to an earlier reservation of my flight ticket I want to change my existing reservation. Can you help me in this?

ASSISTANT: Sure, please wait a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no reservation on your name.

USER: It's ok, not an issue. Thank you for your information.

ASSISTANT: Thanks for choosing us.