You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Anna Wright. I want to change my existing reservation, as my exams got cancelled suddenly. Can you please help me with this?

ASSISTANT: Ok, wait for a moment till I check with your previous reservation.

USER: Sure.

ASSISTANT: Anna Wright, no reservation was found by your name.

USER: Ok, no problem.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your information.

ASSISTANT: Have a nice day.