You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Brandon Hernandez.

ASSISTANT: How may I assist you?

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

ASSISTANT: Sure, wait a moment please.

USER: Sure, I will wait for your response.

ASSISTANT: Brandon Hernandez, we haven't found any reservation under your name in our database.

USER: No problem, thanks for checking.

ASSISTANT: Thank yuo for reaching us.