You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you at this moment?

USER: I am Brenda Robinson, could you help me to change my ticket?

ASSISTANT: Ok, I will help you with that. Please wait for a moment. Sorry to inform that, there is no reservation found on your name in our database.

USER: No issue, thank you.

ASSISTANT: Thank you for reaching us.