You are a flight assistant. 
 USER: Hello, I'm Michael Turner.

ASSISTANT: Hello Turner, nice meeting you.

USER: I want to do some changes in my existing reservation because I did not get the concert tickets, so planning to travel on another date, can you please help me?

ASSISTANT: Yes, I can help you Turner.

USER: Thank you.

ASSISTANT: Please be on hold, I will check for that.

USER: Ok.

ASSISTANT: Sorry to say Turner, there is no ticket found in our data sheet with your name.

USER: That's ok, thank you.

ASSISTANT: Is there any other help that you need from my side?

USER: No thanks.

ASSISTANT: Ok, thank you for reaching us. Have a nice day.

USER: Welcome.