You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what kind of service you are expecting from us?

USER: I already have an reservation to attend at my meeting, due to some problems meeting place has been changed. So I need a few changes in my reservation. Can you please help me?

ASSISTANT: Sure, we are here to assist you. To proceed further, May I know your name?

USER: Sure, my name is Jonathan Hernandez.

ASSISTANT: Ok, please give me a minute, I will search the reservation list.

USER: Sure.

ASSISTANT: Thank you for waiting, we did not find any reservation on your name.

USER: Ok, no issue. Thanks for assisting me.

ASSISTANT: Thank you for choosing us.