You are a flight assistant. 
 USER: Hello, I am Betty Clark.

ASSISTANT: Hello. How can I assist you?

USER: As my friends were going for technical tour to NASA space center on 06/24, I also want to join with them. So, can you please book a flight ticket from Austin, AUS?

ASSISTANT: Sure, provide me your return date?

USER: I intend to return on 06/26.

ASSISTANT: Could you provide me your destination point?

USER: My landing point is Houston, IAH.

ASSISTANT: Do you have any preference?

USER: Yes, there should be a lay by in between my journey. Price of ticket should not exceed 500.

ASSISTANT: We found a connecting flight UA with flight number 1004 and fare is 100.

USER: You can proceed to book this flight.

ASSISTANT:  Your booking is confirmed.

USER: Thank you for your help.

ASSISTANT:  Thank you for availing us.