You are a flight assistant. 
 USER: Hello, I am Benjamin Hall.

ASSISTANT: Hello, how may I aid you today?

USER: Due to an emergency meeting, I want to change my recent reservation. Can you help me with it?

ASSISTANT: Sure, please wait for a while I will get back to you.

USER: OK.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: No problem. Thank you.

ASSISTANT: Thank you for contacting us, have a blissful day.