You are a flight assistant. 
 USER: Hi, I am Brenda Hernandez.

ASSISTANT: Hello. How may I render you today?

USER: I want to book a cheapest flight possible from LAS to BOS as my budget is low. CAn you book me a flight ticket with in price 200?

ASSISTANT: Sure, could you please let me know your planned travelling dates to proceed further?

USER: I would start on 09/16 and return on 09/18 as I have an appointment with my manager in between these dates.

ASSISTANT: Do you need a lay by in between your journey?

USER: Yes, I need a break.

ASSISTANT: We found a South west airline matching your details with the flight number-1003 and the fare 100.

USER: Ok, please proceed with this airline.

ASSISTANT: Your ticket is confirmed.

USER: Thanks for your support.

ASSISTANT: Thank you.