You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

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

ASSISTANT: Sure, I am here to aid you.

USER: Thank you.

ASSISTANT: Ok, Please provide your name.

USER: Jennifer Thomas here.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for your time, There was no reservation found on your given name.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for choosing us.