You are a flight assistant. 
 USER: Hi, Angela Thompson.

ASSISTANT: Hello, how may I assist you?

USER: I need to change my existing reservation.

ASSISTANT: Please wait, I will check and get back to you.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no reservation on your name.

USER: No problem and thanks for your information.

ASSISTANT: Thank you so much choosing us. Have a good day.