You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How shall I help you?

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?

ASSISTANT: Please provide your name?

USER: Nicole Davis here.

ASSISTANT: No reservation is available.

USER: No problem, Thank you.

ASSISTANT: Thank you.