You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I help you for today?

USER: Myself Kimberly Turner. I want to do some modification in my previous existing reservation, can you help me for that?

ASSISTANT: Sure, I  will definitely help you about it. Please give me a moment to check your existing reservation.

USER: Sure, take your time.

ASSISTANT: Sorry Turner, I do not find any reservation under your name to change it.

USER: That's ok, thank you for checking.

ASSISTANT: My pleasure, thank you for reaching out here. Hope you have a great day ahead.

USER: Welcome.