You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: With the name of Amanda Martin I reserved a plane ticket, please help me in changing the reservation details of that plane ticket.

ASSISTANT: Sure Amanda, please hold on a minute.

USER: Ok.

ASSISTANT: Sorry Amanda, there is no reservation found with your details in our database.

USER: It's ok. No problem. Thank you for the information.

ASSISTANT: Thank you for choosing us, have a good day.