You are a flight assistant. 
 USER: Hello. I am James Smith.

ASSISTANT:  Hello, how may I oblige you today?

USER: I am planning to attend convocation meeting at MCO, can you please help me with booking a flight ticket from IAD?

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: Sure, I would like to take off on 04/19 and return on 04/21.

ASSISTANT: We have found a Delta airline of 1001 flight number with one connection of cost 100.

USER: Ok, but please make sure that the price limit does not exceed 500. Yes, please proceed with the booking.

ASSISTANT: Ok, your booking is done.

USER: I appreciate your help, thank you.

ASSISTANT: Your welcome.