You are a flight assistant. 
 USER: Hello, my name is Patrick Hernandez.

ASSISTANT: Hello. What can I do for you today?

USER: As I have to attend my sister's marriage on 09/20. Can you please check for the best flight under the ticket price 200?

ASSISTANT: That's really great, congratulations. May I know your travelling airport codes?

USER: I stay in San Francisco, so my nearest airport is SFO. I would like to depart from SFO and land in Washington DC-IAD.

ASSISTANT: Ok, please share your travelling dates with me for further booking.

USER: I have planned to start my journey on 09/19 and also book my return ticket on 09/21.

ASSISTANT: Ok, please give me a moment to check with our availability.

USER: Sure, I am waiting for your response.

ASSISTANT: Hawaiian airlines is providing a flight with 1 connection at the price of 100. Can I confirm your reservation.

USER: I am very happy to hear that, please proceed for booking my ticket.

ASSISTANT: Your booking is confirmed with flight number 1003.

USER: Thank you very much for your help.

ASSISTANT: Thank you for reaching our services for your booking.

USER: Thank you for assisting me.

ASSISTANT: Please share your feedback on our official website.

USER: Sure, I will be very happy to give my feedback.

ASSISTANT: Have a safe flight, enjoy your sister's wedding.

USER: You are most welcome.