You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Lisa Wright here.

ASSISTANT: How can I help you out?

USER: I want to change my existing reservation details, can you please help me out?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Ok, take your time.

ASSISTANT: Thanks for waiting, there is no active reservation on your name in our data.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for opting us.