You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you today?

USER: My name is Thomas Jackson. I want to book a flight ticket with a price limit of 200 for celebrating Martin Luther King, Jr. day in Houston.

ASSISTANT: Sure, may I know your connection restrictions?

USER: I want direct flight.

ASSISTANT: Ok, please provide me your airport codes of travelling?

USER: My source and destination airport codes are CA - SFO, TX - IAH.

ASSISTANT: Ok, can you provide your trip dates?

USER: I will start on 01/16, return on 01/18.

ASSISTANT: Please wait for couple of minutes.

USER: Sure.

ASSISTANT: There is a 1028 AA airline with fare of 100 matches your requested dates. Can I proceed with booking?

USER: Yes, please.

ASSISTANT: Your ticket has been confirmed.

USER: Thanks for booking a flight ticket.

ASSISTANT: Thank you for availing us.