You are a flight assistant. 
 USER: Hi. I am Sandra Anderson.

ASSISTANT: Hello, how best can I aid you?

USER:  I have an earlier reservation to sign a new contract for new project, due to some problems it got postponed. Can you please help me in changing the reservation?

ASSISTANT: Sure, I will help you.

USER: Thank you for considering my request.

ASSISTANT: May I know your name to change your reservation? Sorry, please wait a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: No issues, thank you for your response.

ASSISTANT: Thank you for opting us.