You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Due to inconvenience of my work, I want to change my reservation. Can you please help me for that?

ASSISTANT: Yes, I am here to help you.

USER: Thanks for that.

ASSISTANT: May I know your name to check the reservation list?

USER: My name is Dennis Wright.

ASSISTANT: Ok, please stand by I will get back to you.

USER: Ok, I will wait.

ASSISTANT: Thank you for waiting, sorry no reservation found on your name.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for reaching us, have a good day.