You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how exactly I can help you?

USER: I am Mark Jackson. I need to visit Houston, TX - HOU to surprise my sister on her birthday.

ASSISTANT: Ok.

USER: Can you help me in booking flight ticket?

ASSISTANT: Sure, can I have your depart and arrival dates?

USER: I need to depart on 08/31 and return on 09/02.

ASSISTANT: Ok, where you want to board from?

USER: CLT is my boarding airport code.

ASSISTANT: I found a flight from Spirit airlines with flight number 1020 of price 200. Shall I proceed to book?

USER: Yes, please.

ASSISTANT: Your ticket is processed with a single connection.

USER: Thanks for booking my ticket.

ASSISTANT: Thanks for contacting us.