You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Deborah Nelson, want to alter my reservation dates. Can you please help me?

ASSISTANT: Sure, I am here to help you.

USER: Thanks.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Thank for waiting, sorry we didn't find any reservation on your name.

USER: It's ok, thank you.

ASSISTANT: Thank you for reaching us, have a good day.