You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. I am here to assist you, may I know your concern?

USER: I would like to reach Chicago to participate in Death Valley adventure, can you help  me to book a flight ticket with in the fare limit 500?

ASSISTANT: Ok, I will assist you. Can I know your travel dates please?

USER: I need to reach Chicago on 08/03 and I will return with in two days that is on 08/05.

ASSISTANT: Ok, provide me your location airport code and destination code?

USER: My source is Boston, MA-BOS and my destination is Chicago, IL-ORD.

ASSISTANT: May I know your name?

USER: I am Jason Cater.

ASSISTANT: Sorry, there is no flight available at your location.

USER: Ok, i'll choose another alternative. Thanks for your information.

ASSISTANT: Ok, thank you for choosing our agency.