You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I made a reservation to attend my friend marriage reception, but the date has changed recently. So I want to change my existing reservation, can you help me?

ASSISTANT: Sure, please wait for a minute.

USER: OK.

ASSISTANT: Sorry you to inform you that there is no reservation found on your name. Can you provide me your to continue further process.

USER: I am Janet Jackson, thanks for your response.

ASSISTANT: Thank you.