You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: Please help me out in booking the ticket from DCA to OAK.

ASSISTANT: Sure, We are here to help you. Can I know your travelling dates?

USER: My trip dates will be July 5 to July 7.

ASSISTANT: Do you need any break?

USER: I need a connecting flight.

ASSISTANT: May I know your name?

USER: Virginia Miller is my name.

ASSISTANT: Is there any other specifications?

USER: I want to fly in a branded airlines.

ASSISTANT: Ok. We are unable to provide flight in between your journey routes due to some technical up-gradation at destination airport.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.