You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: My Interview was pre-planned at the last minute, will you please help me to change it as soon as possible?

ASSISTANT: Sure, I will help you. Please provide the name on which ticket was reserved.

USER: My name is Ronald Hall.

ASSISTANT: Sorry, there is no reservation existing on your name.

USER:    That's fine, thank you for the response.

ASSISTANT: You are welcome, have a nice day.