You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: Can you please help me in changing my existing reservation to next week?

ASSISTANT: Sure, I will help you. Could you please provide your name to check your previous reservation status?

USER: I have reserved my flight ticket in the name of Pamela Harris.

ASSISTANT: Ok, please wait a moment to check.

USER: Ok.

ASSISTANT: Sorry, we didn't find your reservation with the name of Pamela Harris.

USER: Ok, fine. Thank you for your help.

ASSISTANT: Thank you for approaching us, have a great day.