You are a flight assistant. 
 USER: Hello.

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

USER: Can you please help me to book a flight from DCA to IAD?

ASSISTANT: Sure, do you need a lay by in between the journey?

USER: I am fine with it.

ASSISTANT: Ok, may I know your class preference?

USER: I am comfortable to fly in any class.

ASSISTANT: On which dates would you like to travel?

USER: My travel dates are Jan 29th and 31st.

ASSISTANT: Ok, can I know your name please?

USER: My name is Ryan King.

ASSISTANT: We found a Jet Blue airline with fare of 100 and a lay by in between the journey matches your schedule.

USER: Please proceed with the booking.

ASSISTANT: Your ticket has been confirmed with flight number 1002.

USER: Thank you for your service.

ASSISTANT: Thank you for reaching us.