You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Due to heavy rain, I want to change my reservation. Can you help me?

ASSISTANT: Sure, I will help you with that. May I know your good name to check the reservation?

USER: Daniel Nelson here.

ASSISTANT: Thanks for the name, please wait for a moment and let me check the reservation.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is no reservation found on your name.

USER: No problem, Thank you.

ASSISTANT: Thank you for visiting us, we hope see you again.