You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: Can you please change my recent reservation? As I have booked the ticket with wrong dates.

ASSISTANT: Sure, I can change your reservation right now. Before that I need to know your good name please?

USER: Sure, my name is Margaret Perez.

ASSISTANT: Please wait a minute. Sorry to say that, there is no active reservation found on your name.

USER: Oh! That's ok, thank you for giving the information anyways.

ASSISTANT: Thank you for availing us.