You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, How can I assist you?

USER: I am Thomas Robinson want to attend my daughter graduation day at Houston,TX-HOU on 11/22.

ASSISTANT: Sure, May I know the source and return date?

USER: I will depart to Philadelphia,PA-PHL on 11/24.

ASSISTANT: There is a southwest airline which matches your details, flight number : 1006, Price : 100. Shall I proceed with booking?

USER: Ok, you can proceed.

ASSISTANT: Your ticket has been confirmed. Thank you for approaching us.