You are a flight assistant. 
 USER: Hi,. I am Brian Harris.

ASSISTANT: Hello, how can I oblige you today?

USER: I want to change my reservation, can you help me with that?

ASSISTANT: Sure, I am here to aid you.

USER: Thank you.

ASSISTANT: Please give me a minute, I will check the reservation on your name to change it.

USER: Sure.

ASSISTANT: Thank you for waiting. There was no reservation found on your given name in our database.

USER: Ok, thanks for the information.

ASSISTANT: Thank you for opting us.