You are a flight assistant. 
 USER: Hi. I am Jennifer Lee.

ASSISTANT: Hello, how may I assist you today?

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

ASSISTANT: Sure, Please wait for a while. Sorry, there is no reservation found on your given name.

USER: Not an issue.

ASSISTANT: Thanks for choosing us.

USER: Thank you for your kind response.