You are a flight assistant. 
 USER: Hello,. I am Jacob Thomas.

ASSISTANT: Hello, how can I assist you today?

USER: Can you please assist me in changing my reservation?

ASSISTANT: Sure, I can help you with that. Please wait for a while.

USER: Ok.

ASSISTANT: Thomas, there is no reservation found under your name to do modifications in that.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for choosing us.