You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: My name is Brandon Jones, I want to change my reservation. Can you help me?

ASSISTANT: Sure, I will help you. Please wait a while. There is no reservation on your name in our database.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for choosing us. Have a nice day.