You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I help you?

USER: I already had a reservation to attend a meeting, due to some problems meeting place has been changed, so I need few changes in my reservation. Please help me with it.

ASSISTANT: Surely, May I know your name?

USER: Reservation was done by the name Michael Thompson.

ASSISTANT: Please give a minute.

USER: Sure.

ASSISTANT: Sorry, No reservation found on your name.

USER: Fine, thank you.

ASSISTANT: Thank you for opting us.