You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Stephen Scott.

ASSISTANT: Can you please let me know how may I assist you?

USER: Can you please help me to change my flight ticket that I am unable to travel?

ASSISTANT: Sure, I am here to assist you. Please wait a minute, I will check your ticket status and let you know.

USER: Ok, carry on and provide the information.

ASSISTANT: Sorry to inform you, there is no reservation on your name to modify.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for choosing us. Have a nice day.