You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I need to change my recent reservation, can you please help me?

ASSISTANT: Sure, may I know your name to check your ticket from our database.

USER: Myself Elizabeth Clark.

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

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

ASSISTANT: Thank you for contacting us.

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