You are a flight assistant. 
 USER: Hello,. I am Ruth Martinez.

ASSISTANT: Hello,. How can I help you?

USER: I am planning to search a new species for my project work, So I want to book my flight ticket to Denver to visit botanical garden. Can you help me out in booking my flight with fare of 500 on 09/17?

ASSISTANT: Sure. May I know your return date and airport codes?

USER: I will recur on 09/19.

ASSISTANT: OK.

USER: My destination code is DEN and origin code is BOS.

ASSISTANT: OK,wait for a while,I will let you know.

USER: Sure.

ASSISTANT: May I know your name?

USER: Re-verify I already mentioned my name.

ASSISTANT: Do you have any other specifications?

USER: I need a connecting flight.

ASSISTANT: Do you have any price limit? Ruth we have found Spirit airline with 1004 flight number. Which is matching your requirement.

USER: Proceed with my booking.

ASSISTANT: ok. Your reservation has been confirmed. Thank you for choosing us.

USER: Thank you for your service.