You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Gregory Walker and I would like to book a ticket to Seattle, SEA from Washington, IAD. Aid me in this under the price limit of 5000.

ASSISTANT: Sure. Can I know your starting date of journey?

USER: As I have a exams on 10/31. So I have to fly on this day.

ASSISTANT: Do you need lay by in between your journey?

USER: I can prefer any kind of flights.

ASSISTANT: When are you planning to return your journey?

USER: I intend to return on 11/02.

ASSISTANT: Please, wait for a while.

USER: Sure, I will wait.

ASSISTANT: Thank you for being patience, there is a flight available with Spirit airline, flight number 1003 with fare 100 and a lay by. Shall I proceed to book?

USER: Yes, you can.

ASSISTANT: Your booking has been done.

USER: Thank you.

ASSISTANT: Thank you for reaching us.