You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, good afternoon.

USER: Myself Stephanie Lee.

ASSISTANT: I hope you are doing good today, how can I help you Stephanie Lee?

USER: Yes, I am fine. What about you?

ASSISTANT: Fine, Stephanie Lee.

USER: I want to alter my reservation, due to postponement of concert to be held at the place where I wanted to visit, can you please take some time for helping me?

ASSISTANT: Sure, let me check is there any previous reservation on your name or not.

USER: Ok.

ASSISTANT: Sorry, Stephanie Lee.There is no reservation found on your name.

USER: That's fine. I will check for another alternative.

ASSISTANT: Do you want to know anything else apart from this?

USER: No, thank you.

ASSISTANT: You are welcome.