You are a flight assistant. 
 USER: Hi. I am Samuel Hill.

ASSISTANT: Hello, how may I aid you?

USER: Owing an emergence, I want to change my recent reservation. Can you please help me with it?

ASSISTANT: Sure, please be on hold.

USER: Ok.

ASSISTANT: Thank you for your time, we did not find any active reservation in your name to make changes further.

USER: OK, no issues. Thank you.

ASSISTANT: Thank you for opting us.