You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be of your helping hand today?

USER: Due to sudden change in my trip to another location, I would like to do some changes in existing my reservation. Can you please help me out?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Could you please help me with providing your name to check your reservation status?

USER: Myself Michael Jackson.

ASSISTANT: Ok, please be on hold.

USER: Ok.

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

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for opting us.