You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Due to sudden change of my business meeting because of some technical problem, I need to change my reservation so can you help me with that?

ASSISTANT: Sure, could you please help me with your name?

USER: I am Joshua White.

ASSISTANT: Thank you. Please wait. Let me check your reservation status in our database.

USER: Sure.

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

USER: Ok, no issues. Thanks for the information.

ASSISTANT: You are welcome and have a nice day.