You are a flight assistant. 
 USER: Hello, I am Shirley Williams.

ASSISTANT: Hello. How may I aid you today?

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. Can you help me with it?

ASSISTANT: Sure. Please give me a minute, I will check in the previous reservation list.

USER: OK.

ASSISTANT: Thanks for your time. There is no reservation found on your name to change.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.