You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Carolyn Rodriguez, I want to change my ticket with new one. As I need  a ticket with low price. Can you help me in changing my reservation?

ASSISTANT: Sure, I will help you. Please wait for a while.

USER: Sure.

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

USER: Thanks for the information.

ASSISTANT: Thank you for choosing us, have a good day.