You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I want to change my reservation as I have to stay for some more days with my friend at Detroit, could you please help me in changing my reservation?

ASSISTANT: May I know your name please?

USER: Sure, my name is Pamela Moore.

ASSISTANT: Sure, please wait for a while.

USER: Sure, take your time.

ASSISTANT: Moore, sorry no reservation are found on your name in our database.

USER: No problem, anyway thank you for checking.

ASSISTANT: Thank you Moore for contacting us.