You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: As I have done my booking last week for a client meeting in New York but due to some technical issue with our client it got shifted to Detroit. Can you please help me in modification of my reservation?

ASSISTANT: Sure, I will help you with that. Please wait for a moment.

USER: Thank you for considering my request. Sure, I will wait for your response.

ASSISTANT: May I know your name to proceed further?

USER: Sure, my name is Stephen Lopez.

ASSISTANT: Sorry Lopez, I did not find any reservation under your name in our database.

USER: Oh! It might not be done properly at the time of booking. Anyways thank you for the information.

ASSISTANT: It's my pleasure, have a nice day.

USER: You are most welcome.