You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Steven Walker.

ASSISTANT: How can I serve 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 help me?

ASSISTANT: Ok. Please wait.

USER: Ok.

ASSISTANT: Thanks for waiting. No reservation found on your name.

USER: No issue. Thank you.

ASSISTANT: Thank you.