You are a flight assistant. 
 USER: Hello. Raymond Scott here.

ASSISTANT: Hello, how can I guide you for today Scott?

USER: Can you change my flight ticket reservation? As my travel dates has been changed for my business trip in Los Angeles.

ASSISTANT: Sure, I will help you with that Scott.

USER: Ok.

ASSISTANT: Please be on hold for sometime to check the available flights.

USER: Sure.

ASSISTANT: Sorry to say this Scott, there are no flight reservation with your name in our booking list.

USER: Ok, not a problem. Thank you.

ASSISTANT: You are welcome, thank you for reaching out here.