You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I guide you for today?

USER: I am Brian Smith want to go to my hometown, can you help me to book a ticket within the fare of 500?

ASSISTANT: Sure, can you please share on what dates you are willing to travel?

USER: Sure, I want to depart on 01/23 and intend to return on 01/25.

ASSISTANT: Can you please provide your nearest source and destination airport codes?

USER: Sure, I want to fly from DFW to PHL.

ASSISTANT: Please give me a minute, I will look for the best airlines on this routes.

USER: Ok.

ASSISTANT: I found a flight with number 1018 with price 100 and connection limit is 1, would you like me to proceed with the booking?

USER: Yes, you can proceed.

ASSISTANT: Your booking is confirmed with AA airlines.

USER: Thank you.

ASSISTANT: Thank you for availing us.