You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Brandon Mitchell.

ASSISTANT: How can I assist you?

USER: Can you please help me to change my reservation as I want to change the airlines?

ASSISTANT: Ok, please wait for a while.

USER: Sure, I will be waiting for your response.

ASSISTANT: Sorry, no reservation found on your name to change.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Most welcome.