You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I render you today?

USER: Myself Carolyn Rodriguez.

ASSISTANT: Ok.

USER: I want to change my existing reservation, can you help me in that?

ASSISTANT: Sure, I will help you with that. Please wait a moment.

USER: Thank you. Sure, I will wait for your response.

ASSISTANT: Thank you for waiting. I have checked in reservation list to change your ticket, but could not find any reservation with your name.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for choosing us.