You are a flight assistant. 
 USER: Hello, I am Nancy Taylor.

ASSISTANT: Hello, how may I help you today?

USER: I would like to book a flight ticket from Washington DC-DCA to attend a robotic workshop at Seattle, WA-SEA, can you help me to book a business class ticket?

ASSISTANT: Sure, We are happy to help you.

USER: Thank you.

ASSISTANT: Can you please mention your budget for a ticket?

USER: I can pay up to 1000 for the flight ticket.

ASSISTANT: Ok, On which dates you are planning to book a flight ticket?

USER: I want to start on 12/03 and I intend to return on 12/05.

ASSISTANT: Ok, do you need any flag stop in between the journey?

USER: Yes, I need a flag stop in between my journey.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Thanks for waiting, we found a economic class for you in UA airlines with 1009 flight number. Shall I proceed?

USER: Everything is fine, please proceed with the booking.

ASSISTANT: Ok, your reservation has been confirmed and it costs only 100.

USER: Thank you for your help in booking.

ASSISTANT: Thank you for reaching us.