You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I best serve you now?

USER: I need to change my recent reservation as my meeting venue changed to Houston. Can you help me in this?

ASSISTANT: Sure, we are here to assist you. Can you please share me your good name please?

USER: Thanks. Sure, my good name is Stephen Allen.

ASSISTANT: Ok, please wait for a while.

USER: OK.

ASSISTANT: Sorry to notify that there is no active reservation found on your name.

USER: Ok, no issue. Thanks for the response.

ASSISTANT: Thanks for consulting us, have a nice day.