You are a flight assistant. 
 USER: Hi. I am Steven Collins.

ASSISTANT: Hello, how can I provide assistance for you?

USER: I would like to fly from San Francisco CA-SFO, can you please assist me in booking a flight ticket to Houston TX-HOU?

ASSISTANT: Sure, I am glad to help you. Let me know, how much you can afford for this journey?

USER: I can spend upto 500.

ASSISTANT: Can I have your travelling dates please?

USER: My depart will be on 07/30 and arrive on 08/01.

ASSISTANT: Thank you for sharing your details. Please, wait for a moment.

USER: Sure.

ASSISTANT: Thank you for your time, there is a flight available in Southwest airline, flight number 1021 having fare 100 and a lay by. Can I proceed to book?

USER: You can proceed with the booking.

ASSISTANT: Your reservation has been processed.

USER: Thank you for your service.

ASSISTANT: Thank you for availing us.