You are a flight assistant. 
 USER: Hello. I am Matthew White.

ASSISTANT: Hello, how may I assist you now?

USER: I want to book a ticket to Dallas to visit Botanical Gardens, can you make a reservation from Boston, BOS?

ASSISTANT: Sure, please share me your planned journey dates?

USER: My travelling dates are on 12/18 and 12/20.

ASSISTANT: May I know your destination airport code?

USER: My destination airport code DFW.

ASSISTANT: Do you want any halt in between your flight journey?

USER: I need a direct flight.

ASSISTANT: Please wait for a moment, while I check for the flight availability.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is no flight available on your given journey data.

USER: Ok, thanks for informing me.

ASSISTANT: Thank you for visiting us.