You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today.

USER: I am planning to have a vacation at San Francisco, can you please book a ticket with fare 5000?

ASSISTANT: Sure, let me know your journey points?

USER: My airport codes are from ORD to SFO.

ASSISTANT: May I know your travelling dates for checking the flight availability.

USER: I would like to travel on 10/21 and return on 10/23. I need a connecting flight.

ASSISTANT: We are happy to inform that a flight with Frontier airline, 1025 flight number a seat is available. Shall I proceed for booking with single connection and fare of 100?

USER: You can proceed with booking.

ASSISTANT: Let me know your name for proceeding.

USER: I am Raymond Hernandez.

ASSISTANT: Ok, your ticket has been reserved.

USER: Thank you for your assistance.

ASSISTANT: Have a safe journey. Thanks for availing us.