You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you change my reservation which I had done recently to my planned journey details?

ASSISTANT: Sure, may I know your name?

USER: Yes, please check for the name William Baker.

ASSISTANT: Can you please wait a minute?

USER: Sure.

ASSISTANT: Sorry, we could not find any reservation on your name.

USER: That is ok, thank you for assisting me.

ASSISTANT: Thank you for opting us.