You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you now?

USER: I am Helen Parker. Can you help me to book a flight from IAD to DFW?

ASSISTANT: Sure Helen Parker, can I have your travel dates please?

USER: Ok, my travel dates are 04/18 and 08/20 respectively.

ASSISTANT: Ok Helen Parker, please wait a moment.

USER: Ok, I will wait. Please book a direct flight.

ASSISTANT: There is a flight with connection 1 and price 300 in JetBlue airlines. Shall I proceed with booking?

USER: Ok, not a problem. Thank you for helping me I was looking for a direct flight.

ASSISTANT: Sorry Helen Parker, no flight is available to you with connection 0.

USER: Ok.

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