You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I have meeting with president at National Mall. Can you do the reservation?

ASSISTANT: Sure, may I know your name to proceed further?

USER: I am Larry Brown here.

ASSISTANT: Could you please share your airport codes?

USER: Airport codes are DCA-EWR.

ASSISTANT: Do you have any preference connections and price limit?

USER: Price limit 500 with one connection.

ASSISTANT: Please assign your planned dates?

USER: Dates are 08/10 and 08/12.

ASSISTANT: Ok, please wait for a while, let me check with the airlines and get back to  you.

USER: Sure.

ASSISTANT: Thanks for your valuable time, sorry, unfortunately we have a direct flight of Hawaiian airline.

USER: Please do not proceed.

ASSISTANT: Ok, thanks for your interest.

USER: Thanks for the information.

ASSISTANT: Have a great day ahead.

USER: Have a nice day.