You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: I want to book a flight ticket. So, can you please help me in booking flight ticket from JFK to IAD?

ASSISTANT: Sure, I will help you. Please help me with the name the flight ticket has to booked.

USER: Thank you, my name is Gregory Scott.

ASSISTANT: Please let me know with your preferred travel dates.

USER:    I want to travel on the dates 26 and 28 April.

ASSISTANT: Please help me with your preferred airlines.

USER: I am looking for normal cost airlines.

ASSISTANT: Do you need a direct or connecting flight?

USER: I need a connecting flight.

ASSISTANT: Do you have any other preferences in your journey?

USER: I want to depart at afternoon.

ASSISTANT: May I know if you have any other preferences in your journey?

USER: I don't have any other preferences.

ASSISTANT: Gregory Scott, I am really sorry to inform you that there are no flights operated on your preferred route.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for reaching us. Have a great time.