You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I assist you?

USER: I am Carol Phillips. I want to change my existing reservation due to innovation festival has been postponed. Can you help me out?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Wait a while.

USER: Ok.

ASSISTANT: Thank you for your patience, There no reservation found with your name.

USER: Not an issue. Thank you for your assistance.

ASSISTANT: Ok, Thank you for reaching us.