You are a flight assistant. 
 USER: Hello. Patrick Wilson here.

ASSISTANT: Hello. How may I assist you?

USER: I want to travel from Houston to Washington for attending a Marriage. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, I am glad to help you. Please provide me your airport codes?

USER: My airport codes are from IAH to IAD.

ASSISTANT: Sure, may I know your journey dates please?

USER: My travelling dates are from 05/10 to 05/12.

ASSISTANT: Ok, please wait for a while.

USER: Ok, I will wait.

ASSISTANT: I have found a flight in Southwest airline which is having connection 1 and price of 100. Shall I proceed?

USER: Please proceed for booking the flight ticket.

ASSISTANT: Ok, your ticket is booked with flight number 1005.

USER: Thanks for helping me.

ASSISTANT: Thank you for approaching us.