You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Can you please book a flight ticket from DCA to OAK?

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: I want to start on Dec 20 and return on Dec 22.

ASSISTANT: May I know your name?

USER: My name is Laura Johnson.

ASSISTANT: Would you let us know if you have any other preferences?

USER: I need a connecting flight.

ASSISTANT:  Ok, please wait a minute I will get back to you with the flight details.

USER: Ok.

ASSISTANT: As per the intents mentioned, Delta Airlines is providing a connecting flight and the airfare is about 100. Shall I proceed with flight 1004?

USER: You can proceed with booking.

ASSISTANT: Your booking is done.

USER: Thank you.

ASSISTANT: Thanks for reaching us.