You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you for the day?

USER: I need to modify my reservation as my schedule got postponed to some other day. Can you help me with that?

ASSISTANT: Sure, I will help you with that. May I know your name please?

USER: Thank you for considering my request. My name is Timothy Gonzalez.

ASSISTANT: Please wait for a moment, let me check your previous reservation status.

USER: Sure, I will wait.

ASSISTANT: Thank you for waiting. There is no active reservation found on your name in our database to change it.

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

ASSISTANT: Most welcome, thank you for reaching us. Have a great day.