You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Shirley Baker, want to alter my recent reservation due to some changes in my plan. Please help me out with that.

ASSISTANT: Sure, please wait for a while.

USER: Ok, take your time.

ASSISTANT: Thanks for waiting, there is no active reservation on your given name.

USER: It's ok, thank you for your help.

ASSISTANT: Thank you for opting us.