You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I want to change my reservation due to postponed of my Cricket match to other dates, so please help me in changing.

ASSISTANT: Sure, I will try to help you but I need your name to check the reservation.

USER: Thank you for accepting my request. My name is Nicholas Phillips.

ASSISTANT: I could not find any reservation with your name in our database.

USER: No problem, thank you.

ASSISTANT: My pleasure.