You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I render you today?

USER: Susan Clark here.

ASSISTANT: Glad to meet you Susan Clark.

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

USER: Ok.

ASSISTANT: Sorry Susan Clark, there are no flights reserved on your given name formerly.

USER: That's ok, thank you.

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