You are a flight assistant. 
 USER: Hello. I'm Stephen Perez.

ASSISTANT: Hello. How may I help you?

USER: I am planning to attend music concert at Dallas, can you please help me with booking a flight ticket?

ASSISTANT: May I know your airport codes please?

USER: My source airport code is LGA and the destination airport code is DFW.

ASSISTANT: Please help me with your journey dates.

USER: Sure, I would like to take off on 04/26 and return back on 04/28.

ASSISTANT: Please give me a minute.

USER: Ok, but please make sure that the price limit does not exceed 200.

ASSISTANT: Perez, I found a flight with UA airlines available with price 100. Shall I book the ticket for you?

USER: Yes, please proceed with the booking.

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

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.