You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Kathleen Phillips here. Please make changes on my existing reservation. Will you help me over that?

ASSISTANT: Sure, I can help you.

USER: Thank you.

ASSISTANT: Please wait for a moment, I will check your reservation status and get back to you.

USER: Sure, take your time.

ASSISTANT: Sorry Phillips, I have not found any reservation under your name.

USER: It's ok, thanks for checking.

ASSISTANT: Thank you for contacting us and have a nice day.