You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Nicole Martinez.

ASSISTANT: How can I assist you?

USER: I need a flight ticket booking from IAD to JFK to attend a workshop, could you please guide me in flight ticket booking?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please share your travelling dates.

USER: I want to fly on Apr 19th and return back on Apr 21st.

ASSISTANT: Do you need any halt in between the journey?

USER: Yes, I need a single halt.

ASSISTANT: Do you have any other specifications on your trip?

USER: I would like to depart in afternoon time.

ASSISTANT: Please stand by.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry we didn't find any flights with your details.

USER: Sad to hear that one from your end. Anyway, thank you for your quick response.

ASSISTANT: Thank you for opting us, have a good day.

USER: Welcome.