You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: As my plan to visit Mark Water park at Denver with my friends, can you help me to book a flight ticket with in the fare limit 5000?

ASSISTANT: Sure. May I know your good name?

USER: I am Sarah Johnson.

ASSISTANT: When do you want to travel?

USER: My plan to start on 06/24 and I will return with in two days that is on 06/26.

ASSISTANT: Let me know your airport codes to process your booking.

USER: My airport codes are from Chicago, IL-ORD to reach Denver, CO-DEN.

ASSISTANT: Please standby.

USER: Ok.

ASSISTANT: Spirit airline flight with fare 100 and 1004 number is available having a lay by on your dates. Shall I proceed?

USER: Yes, you can book the ticket.

ASSISTANT: Your ticket was booked.

USER: Thanks for helping in booking.

ASSISTANT: Thank you for opting us.