You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Kimberly Davis here.

ASSISTANT: How can I help you.

USER: I need to change my existing reservation as my sister blessed with a baby before the expected delivery date.

ASSISTANT: Ok, give me a moment.

USER: Ok.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: That's ok, thank you for your help.

ASSISTANT: Thank you for consulting us.