You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you you today?

USER: I would like to return on 03/23 after completing my research at Oakland. Can you help me book a flight ticket from Las Vegas on 03/21?

ASSISTANT: Sure, please let me know your connection preference.

USER: I choose a connecting flight.

ASSISTANT: Is there any fare limit?

USER: 200 is my fare limit.

ASSISTANT: Could you please let me know your exact airport attributes to proceed further?

USER: My airport codes are LAS and OAK.

ASSISTANT: Thanks for sharing your journey details.

USER: Ok.

ASSISTANT: We found a Delta airline matching your specifications with the flight number-1019 and the fare 100.

USER: You can proceed for booking.

ASSISTANT: Your reservation has been processed. May I know your name please?

USER: Amy Hernandez is my name.

ASSISTANT: Thank you.

USER: Thank you.