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

ASSISTANT: Hello, how can I help you today?

USER: I am going to attend a seminar in Boston University on 08/12, can you please book me a flight ticket?

ASSISTANT: Sure, please share your boarding and landing airport codes?

USER: I want to board from PHL and land at BOS.

ASSISTANT: Ok, let me know your return date?

USER: I will come back on 08/14.

ASSISTANT: Ok, any other requirements to be met?

USER: I am looking for a flight ticket within price 1000.

ASSISTANT: Ok, Thanks for sharing your details, no flights found with your requested details.

USER: No problem, thank you.

ASSISTANT: Thank you for opting us.