You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you today?

USER: Please change my recent reservation which I previously booked.

ASSISTANT: On which name your ticket has been reserved?

USER: On Janet Walker name.

ASSISTANT: Please give me a moment.

USER: Ok.

ASSISTANT: We did not find any reservation on your given name in our data.

USER: That's ok, thank you.

ASSISTANT: Thank you for opting us.