You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I aid you?

USER: I am Shirley Perez. I need to change my reservation, can you help me with it?

ASSISTANT: Sure, give me a minute.

USER: Sure.

ASSISTANT: There is no reservation found on your name.

USER: Its ok, thank you for your help.

ASSISTANT: Thanks for reaching us.