You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I best aid you now?

USER: I am planning to conduct a free medical camp in Washington, so please book a flight ticket from DFW to IAD.

ASSISTANT: Sure, can you please let me know your travelling dates?

USER: I want to fly on Feb 02, return on Feb 04.

ASSISTANT: Do you need any way station in between journey?

USER: No, I want direct flight.

ASSISTANT: Ok, which type of class do you prefer for your journey?

USER: I am comfortable with any class.

ASSISTANT: Is there any other specifications for you?

USER: No.

ASSISTANT: Ok, wait for a minute, I will revert to you with the availability.

USER: Sure.

ASSISTANT: We have found a direct flight with American airlines, flight number 1000 and the fare of 200. Would you like me to proceed next?

USER: Ok, proceed to booking.

ASSISTANT: Sure, for that I need to know your name. Can you please provide me?

USER: My name is William Jackson.

ASSISTANT: Sure, a seat has been reserved successfully for a economy class flight.

USER: Thank you.

ASSISTANT: Thank you for your presence. We hope to serve you again.