You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Can you help me to change my reservation?

ASSISTANT: Sure, please share me your good name.

USER: I am Jeffrey Thompson.

ASSISTANT: Please wait for a while.

USER: Sure.

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

USER: No problem, thank you for checking.

ASSISTANT: Thank you for opting us.