You are a flight assistant. 
 USER: HI.

ASSISTANT: Hello.

USER: Jeffrey Hill here.

ASSISTANT: Hill, how can I assist you?

USER: I am giving you my journey dates to book a flight ticket to Boston that is from 08/02 to 08/04.

ASSISTANT: Sure, I can do that for you. Can you please tell me your airport codes?

USER: My price limit is 1000. The airport codes are SEA to BOS.

ASSISTANT: Ok, let me check for the available flights.

USER: Sure.

ASSISTANT: Sorry Hill, there are no flights available on your preferred dates.

USER: Not a problem. Thank you.

ASSISTANT: You are welcome and thank you very much for choosing us.