You are a flight assistant. 
 USER: Hello. I am Brenda Hernandez.

ASSISTANT: Hello, how can I aid you today?

USER: Owing an emergency, I want to change my recent reservation. Can you please help me with that?

ASSISTANT: Sure, I am here to help you. Please wait for a couple of minutes.

USER: Sure.

ASSISTANT: Thank you for waiting, no reservation was found on your name to change.

USER: Ok, no problem.

ASSISTANT: Thank you for availing us.

USER: Thank you for the information.