You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am Richard Perez here, I want to reserve my ticket within the price limit of 500, can you please help me to reserve my ticket?

ASSISTANT: Sure Richard, may I know your planned journey dates?

USER: Sure, my dates of travel is from 08/20 to 08/22.

ASSISTANT: Please provide me your respective airport codes.

USER: Ok, my respective airports codes of journey is from DCA to DFW.

ASSISTANT: Please wait for a minute.

USER: Sure, take your time.

ASSISTANT: I found a flight in Frontier airlines with price 100. Can I book the ticket for you?

USER: Ok, you can book it.

ASSISTANT: Your ticket is confirmed and the flight number is 1003.

USER: Thank you for your help in booking me a ticket.

ASSISTANT: Thank you for choosing us, have a safe journey.