You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I would like to do some changes in my existing reservation, can you help me in that?

ASSISTANT: Ok, please share your name and let me see if I can help you with it.

USER: Sure, the ticket has been reserved on the name Benjamin Harris.

ASSISTANT: Ok, kindly wait for a while.

USER: Sure, I will wait for your response.

ASSISTANT: We didn't find any reservation on your name to change.

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

ASSISTANT: Thank you.