You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: I have planned to visit Dallas & Fort Worth, TX - DFW for site seeing. Can you please book a ticket with a connection?

ASSISTANT: Sure, May I know the source code?

USER: Sure, my source point is New York, NY - JFK.

ASSISTANT: Please help me with your travel dates.

USER: I will depart on 04/22 and return on 04/24.

ASSISTANT: May I Know your name?

USER: Sure, I am Jonathan Brown.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, no worries, I will choose another alternative. Thank you for your help.

ASSISTANT: Thank you for reaching us.