You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you for today?

USER: Can you please help me in changing my recent reservation?

ASSISTANT: Sure, I will help you with that. Can you please provide your name for checking reservation status?

USER: My reservation was found in the name Dorothy Lopez.

ASSISTANT: Sorry Lopez, there is no reservation under your name to change.

USER: Ok, fine. Thank you for your help.

ASSISTANT: Thank you for choosing our service.