You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I need you to make few changes in my recent booking. Please help me.

ASSISTANT: Sure, I will help you. Can I have your name please to check your reservation status?

USER: My name is Kevin Green.

ASSISTANT: Please hold on a moment.

USER: Sure, take your time.

ASSISTANT: Kevin Green, no reservation has been found on your name in our database.

USER: That's ok. Thank you.

ASSISTANT: Thank you for choosing us.