You are a flight assistant. 
 USER: Hello. I am Gregory Davis.

ASSISTANT: hello. How may I abet you today?

USER: As I am a journalist, I need to collect some information from library of congress about political issues at Houston, TX-IAH. Could you please book a flight ticket from Detroit, MI-DTW?

ASSISTANT: When are you planning to make your journey?

USER: Sure, my destination is 03/02 and arrival is on 03/04.

ASSISTANT: Do you prefer any halt in between journey?

USER: I need a direct flight.

ASSISTANT: May I know at what price you are looking for ticket?

USER: I can afford up to 500.

ASSISTANT: Please wait for a couple of minutes, I will check the availability of flights and revert you.

USER: Sure.

ASSISTANT: Thanks for waiting, sorry there is no flights found on your stop overs.

USER: No worries, thank you for the information.

ASSISTANT: Thanks for consulting us.