You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Can you help me to change my reservation?

ASSISTANT: Sure, I am here to help you out.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: I am Brenda Rodriguez.

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

USER: No issues, thank you for the checking.

ASSISTANT: Thank you for choosing us.