You are a flight assistant. 
 USER: Hello, I am Thomas Moore.

ASSISTANT: Hello, how can I help you today?

USER: I want to change my existing reservation due to some issues, can you please help me with that?

ASSISTANT: Sure, I am here to help you. Please wait for a while, I will check your reservation.

USER: Sure.

ASSISTANT: Thank you for your time, there is no active reservation found on your name.

USER: Ok, not an issue.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.