You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: Due to some entrepreneurship meeting, I am going to change my existing reservation. Can you help me?

ASSISTANT: I am here to help you about that.

USER: Thank you.

ASSISTANT: Can you please provide your name to check the reservation status with your name?

USER: Carolyn Williams here.

ASSISTANT: Sorry to say this Carolyn Williams, there is no active reservation with your name in our booking list.

USER: No problem, Thanks for the information.

ASSISTANT: You are welcome, thank you for reaching us.