You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I am Samantha Jackson. Can you help me in modification of my reservation as my schedule got postponed to July 9th?

ASSISTANT: Sure, I will help you. Please wait a moment.

USER: Sure.

ASSISTANT: Sorry there is no reservation on your name.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Thank you.