You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today at this moment?

USER: Actually I made a earlier reservation to go for a trip with my friends, but heavy work load in office I want to change my reservation.

ASSISTANT: Sure, on which name your previous ticket has been reserved?

USER: On my name Helen Wright.

ASSISTANT: Just give me a moment.

USER: Ok.

ASSISTANT: Unfortunately we did not find any reservation on your given name.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for opting us.