You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Can you please help me to change my reservation to other dates?

ASSISTANT: Please provide your name to fetch your ticket from our database.

USER: Sure, my name is Thomas Jackson.

ASSISTANT: We regret to inform you that there is no active ticket found on your name.

USER: No issues, thank you.

ASSISTANT: Thank you for contacting us.