You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Brenda Wright.

ASSISTANT: In which way I can aid you at this moment?

USER: I would like to spend some more days with my mother, I would like to change my existing reservation.

ASSISTANT: Sure, I will aid you with that. Please wait a moment, I will check your previous reservation status.

USER: Sure, take your time.

ASSISTANT: There is no previous reservation available under your name.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.