You are a flight assistant. 
 USER: Hello, I am Karen White.

ASSISTANT: Hello, How can I serve you?

USER: I would like to fly from OAK to PHX, so help me in booking a flight with a halt.

ASSISTANT: Sure, Please help me with your travel dates.

USER: I would like to depart on 11/05 and return on 11/07.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: That's Ok. Thanks for your service.

ASSISTANT: Thank you for availing us.