You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Is there any help that you are seeking from my side?

USER: Myself Raymond Allen. I need to travel to Phoenix, can you help me booking flight ticket from DCA to PHX?

ASSISTANT: Sure, our agency can help you in that one. Can I know your departure and arrival dates of your journey?

USER: My travelling dates are 11/25 and 11/27, I need a business class ticket with 5000 budget.

ASSISTANT: Please give me a moment to search for the flights on your journey dates.

USER: Take your time.

ASSISTANT: I found a flight in Hawaiian airlines with a ticket fare of 100 and there is a 1 stop and go in your trip in 1014 flight. Can I proceed with ticket booking?

USER: Please proceed with the booking.

ASSISTANT: Ok, as per your request the flight ticket has booked in 1014 flight and there is a change in airlines from Hawaiian to Frontier due to sold out of tickets in Hawaiian airlines.

USER: Thank you for booking ticket.

ASSISTANT: You are most welcome and thank you for reaching us.