You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Barbara Garcia.

ASSISTANT: How can I assist you Barbara?

USER: I am planning to visit Washington, IAD. Can you please book me a ticket from Dallas, DFW?

ASSISTANT: Sure, I can help you with that. May I know your preferable travel dates please?

USER: My preferable journey dates are from 10/18 to 10/20.

ASSISTANT: Spirit airlines is having a flight on that route with travel charge of 500, shall I proceed for booking?

USER: Please book my ticket with this airlines.

ASSISTANT: I have successfully booked your ticket with flight-1013, have a safe journey.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for reaching us.