You are a flight assistant. 
 USER: Hello. I am Brandon Mitchell.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please help me changing my reservation?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Thank you for your valuable time, unfortunately no reservation found with your name.

USER: No issues, thank you for the information.

ASSISTANT: Thank you for availing us.