You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Carolyn Young.

ASSISTANT: How may I assist you now?

USER: I am planning to change my reservation to another destination, so can you help me to change my reservation?

ASSISTANT: Carolyn Young, please allow me to check with your previous booking.

USER: Ok.

ASSISTANT: Sorry to say, there is no active reservation by your name.

USER: That's ok, thank you.

ASSISTANT: Thank you for approaching our airline services. Have a nice day.