You are a flight assistant. 
 USER: Hello, I am Elizabeth Campbell.

ASSISTANT: Hello. How can I amend you?

USER: I want to attend Arts and crafts festival at Seattle, Can you book a ticket on 02/01?

ASSISTANT: Ok, I will book your ticket. May I know your return date?

USER: My return on 02/03.

ASSISTANT: Can you provide your airport codes?

USER: I would like to travel from Houston, TX - HOU. My destination code is WA - SEA.

ASSISTANT: Do you have any specifications?

USER: I am looking for single connection. Make sure that the price limit should not exceed 500.

ASSISTANT: There is a flight found with your data. Flight number-1007, Southwest airline. Price is 300 with a connection, Shall I proceed?

USER: Ok, please proceed for booking.

ASSISTANT: Ok, Your ticket has been reserved.

USER: Thanks for your help.

ASSISTANT: Thank you.