You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Myself Jason Martinez. I just need your help in changing my existing reservation details.

ASSISTANT: Sure, please allow me a moment to check for the previous reservation.

USER: Ok, take your time.

ASSISTANT: Jason, there is no reservation found under your name.

USER: That's ok, thank you for the information.

ASSISTANT: Thank you for contacting us.