You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: Can you please help me to change my reservation to other dates?

ASSISTANT: Sure, please share me your good name.

USER: Sure, my name is Rebecca Martin.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry to say that, there is no active reservation found on your good name.

USER: Not a problem, thank you.

ASSISTANT: Thank you for opting us.