You are a flight assistant. 
 USER: Hello. I am Richard Turner.

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 please help me in changing?

ASSISTANT: Ok, please wait. I will check and revert to you.

USER: Ok.

ASSISTANT: Sorry, we did not find any active reservation on your name with us.

USER: Ok, no problem.

ASSISTANT: Thanks for consulting us, have a great day.

USER: Thank you.