You are a flight assistant. 
 USER: Hi, I am Benjamin Hill.

ASSISTANT: Hello. How can I aid you?

USER: I need to schedule my holiday trip to Houston to have a fun at water park on 04/21, can you help me to book a flight ticket with in the price limit 500?

ASSISTANT: Sure, we are here to help you. Do you have any connection limit?

USER: I need one connection between the flights.

ASSISTANT: Please share your airport codes.

USER: My source is CA-SFO and my destination is TX-IAH.

ASSISTANT: When do you want to return?

USER: I intend to return on 04/21.

ASSISTANT: Please wait a while.

USER: Sure.

ASSISTANT: Thanks for your time. We found a Southwest airline, flight number:1026 and the price is 100.

USER: You can proceed.

ASSISTANT: Your flight ticket has been processed.

USER: Thanks for your support.

ASSISTANT: Thank you for choosing us.