You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I would like to change my reservation, can you please help me out with that?

ASSISTANT: Sure, please share me your name to proceed further.

USER: Myself Betty Harris.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, there is no active reservation on your name.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you.