You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Jacob Moore. Can you help me in changing my reservation?

ASSISTANT: Jacob Moore, please wait for a moment.

USER: Ok.

ASSISTANT: Jacob Moore, there is no reservation by your name. Sorry for the inconvenience.

USER: That's ok. Thank you.

ASSISTANT: Thank you for choosing our services.