You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: My self Lisa Adams. I would like to change my recent reservation as I am stuck with  my exams. can you help me.

ASSISTANT: Sure, I am here to help you. Hold on for a moment. Let me check.

USER: Sure, take your time.

ASSISTANT: Sorry Lisa Adams, there are no flights reserved on your given name formerly.

USER: No issue. Thank you for reaching us.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.