You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

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 with that?

ASSISTANT: Sure, can I have your name please?

USER: I have made the reservation under the name Charles Carter.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

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

USER: No worries, thank you for your information.

ASSISTANT: Thank you for opting us.