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

ASSISTANT: Hello, how may I aid you?

USER: Due to sudden work, I need to change my reservation. Can you please help me with it?

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Thanks for your time, there is no reservation found on your name.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thanks for opting us.