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

ASSISTANT: Hello, how may I assist you?

USER: I would like to attend a seminar on social issues in pioneer plaza at Houston. Can you book me a less expensive flight within price 200 to reach there?

ASSISTANT: Sure, can I know your trip dates?

USER: I would start on 09/22 and return on 09/24.

ASSISTANT: May I know your airport codes?

USER: My origin is MSP and destination is IAH.

ASSISTANT: Wait a minute.

USER: Sure.

ASSISTANT: We found a flight on AA airline, flight number as 1000 with the fare of 100. Can I proceed?

USER: Yes, please proceed.

ASSISTANT: Your ticket has been booked.

USER: Thanks for your service.

ASSISTANT: Thank you for availing us.