You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can we assist you today?

USER: I have booked a ticket last week with a wrong destination, can you please change my existing reservation?

ASSISTANT: Sure, can you provide me your name please?

USER: Yes, I am Angela Johnson.

ASSISTANT: Sorry Johnson, I have not found any reservation by your name in our database.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: You are welcome.