You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. May I know your good name, Please?

USER: I am Nicholas Hill.

ASSISTANT: How may I help you for the day?

USER: I need to book a flight ticket under the range of 5000. Can you help me with booking on 06/28?

ASSISTANT: Sure. May I know your airport codes, Please?

USER: I want to travel from DFW to HOU to attend my friends wedding. My return date is 06/30.

ASSISTANT: OK.

USER: Make sure that connection must be 1.

ASSISTANT: Sure. We found an Southwest airline with flight number:1001 matching all your requirements. Shall I proceed with the ticket booking?

USER: OK, You can proceed.

ASSISTANT: Your ticket is booked. Thank you, For choosing us to book your ticket.

USER: Ok, thanks for your service.

ASSISTANT: Have a great journey.