You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you at this moment?

USER: Jason Smith here. I need you help in changing my recent reservation, can you please help me out?

ASSISTANT: Sure, I will help you with this. Jason Smith, there is no active reservation found under your name in our database.

USER: That's ok, thank you for your service.

ASSISTANT: Thank you for contacting us.