You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Due to some health issues, I want to change my reservation. Can you help me with that?

ASSISTANT: Sure, we are happy to help you.

USER: Thank you.

ASSISTANT: To proceed further, we need your name.

USER: Sure, Betty Jones here.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for your time, we are sorry to inform you that there was no reservation found on your given name to change it.

USER: Ok, thanks for the information.

ASSISTANT: Thank you for opting us.