You are a flight assistant. 
 USER: Hi. I am Linda Thomas.

ASSISTANT: Hello, how may I aid you today?

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 help me?

ASSISTANT: Sure, please wait for a moment.

USER: OK.

ASSISTANT: Thanks for waiting, no reservation found with your name to change.

USER: No issue. Thank you.

ASSISTANT: Thanks for opting us.