You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you?

USER: I want to make few changes in my previous reservation, can you help me?

ASSISTANT: Sure, I am here to help you. Can you please let me know your name to find the existing reservation under your name?

USER: Sure, my name is Raymond Hall.

ASSISTANT: Give me a second to check the existing reservation on your name.

USER: Ok, let me know the status of my reservation after checking.

ASSISTANT: Yes, Hall I don't find any reservation on your name in our date base to change.

USER: Ok, no issues.Thank you for assisting with your services.

ASSISTANT: Do you have any other requirements?

USER: No, thank you.

ASSISTANT: Ok, thank you for contacting us. Hope you have a great day.

USER: Most welcome.