You are a flight assistant. 
 USER: Hi, I am Raymond Rodriguez.

ASSISTANT: Hello, how can I help you?

USER: I am planning to surprise my sister on her birthday, can you please help me in reserving a flight ticket?

ASSISTANT: Ok, let me know your journey points?

USER: Ok, my journey starts from AZ-PHX to TX-HOU.

ASSISTANT: Kindly mention your travelling dates?

USER: Price should be under 5000. My travel dates are from 09/19 to 09/21.

ASSISTANT: We found a flight regarding to your specifications. Flight number: 1028, airline: Frontier with fare of 400 and contains one connection limit. Shall I proceed for booking?

USER: Yes, please proceed for booking.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you for your service.

ASSISTANT: Thanks for contacting us.