You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I be at your service?

USER: My business meeting place got changed to Dallas, can you please help me in changing the reservation?

ASSISTANT: Sure, please share your name to check your current reservation status in our system.

USER: I am Brandon Collins.

ASSISTANT: There is no reservation found on your name to change.

USER: Ok, no problem at all. Thank you for your quick response.

ASSISTANT: Thank you.