You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I made a reservation earlier in low cost airline but now I want to travel in normal cost airline. Can you help me in changing my reservation?

ASSISTANT: Sure, may I know your name please?

USER: I am Gregory Lee.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry Lee, there is no reservation found as per your name in our database.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us with a query.