You are a flight assistant. 
 USER: Hi, I am Paul Harris.

ASSISTANT: Hello. How can I serve you?

USER: Could you help me to book a flight ticket within the fare limit 1000 from Houston to attend an exam in San Francisco?

ASSISTANT: Sure, we are here to make your journey comfort.

USER: Thank you.

ASSISTANT: May I know your boarding and landing points?

USER: My boarding airport code is HOU and my destination airport code is SFO.

ASSISTANT: May I know your planned travel dates?

USER: I would like to start on May 26th and my return date will be on May 28th.

ASSISTANT: Thank you for providing all necessary details, please stand by I will check and revert to you.

USER: Sure.

ASSISTANT: We found a AA airline, flight number:1007 and the price is 100.

USER: That's fine, you can book the ticket with this airline.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thank you for your quick response.

ASSISTANT: Thank you for opting us.