You are a flight assistant. 
 USER: Hello. My name is David Hall.

ASSISTANT: Hello, how can I help you?

USER: I have an appointment at Oakland, CA-OAK on 06/12 with my client so, Can you please assist me to book a ticket?

ASSISTANT: Sure, may I know when you want to return?

USER: I want to catch my return flight on 06/14.

ASSISTANT: Ok, please share your source code.

USER: My source airport code is Washington, DC-DCA.

ASSISTANT: Do you require any stopovers in your journey?

USER: I need a stopover in between journey.

ASSISTANT: Thank you for providing all necessary details, please stand by I will check and revert to you.

USER: Sure.

ASSISTANT:  Thanks for waiting, we are pleased to inform you that we have found a Frontier airline, flight number-1008 connections-1 and price limit is 100. Shall I proceed?

USER: Please proceed for booking.

ASSISTANT: Sure, your booking is done.

USER: Thank you.

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