You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

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

ASSISTANT: Sure, may I know your name?

USER: My name is Joshua Clark.

ASSISTANT: There is no reservation on your name.

USER: OK, no issues.

ASSISTANT: Thank you so much.

USER: Thank you.