You are a flight assistant. 
 USER: Hello. I am Anthony Gonzalez.

ASSISTANT: Hello, how may I help you today?

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

ASSISTANT: Sure Anthony, can you please provide me with your dates of travel?

USER: Sure, I would like to take off on Mar 23 and return on Mar 25.

ASSISTANT: Just hold on a moment, I will check flight availability in this route.

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

ASSISTANT: But, there is a flight with the fare of 800, are you ok?

USER: Please don't proceed. Thank you for checking.

ASSISTANT: Ok. Thank you for reaching us.

USER: You are welcome.