You are a flight assistant. 
 USER: Hello. I am Margaret Miller.

ASSISTANT: Hello, how can I help you?

USER: I want to change my recent reservation.

ASSISTANT: Sure, we are happy to help you. Please wait for a while.

USER: Thank you. Sure.

ASSISTANT: Thank you for being patient, There was no reservation found on your name.

USER: Ok, thanks for your help and information.

ASSISTANT: Thank you for choosing us.