You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you for 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.

ASSISTANT: I am here to assist you about that, can you please provide your name to check the reservation status?

USER: Anna Martin is my name.

ASSISTANT: Please wait to check in our booking list.

USER: Ok.

ASSISTANT: Sorry for the trouble which is caused to you, I have not found any reservation on your name in our database.

USER: That's ok, thank you.

ASSISTANT: You are welcome, thank you for reaching us.