You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Richard Collins.

ASSISTANT: How can I help you?

USER: I need to celebrate my marriage anniversary in Minneapolis and St.Paul  MN-MSP and we planned to attend the event on 08/21. Could you please help me in booking a ticket on 08/20?

ASSISTANT: Sure, I am here to help you. May I know when you want to return?

USER: I would like to return to Houston on 08/22.

ASSISTANT: Ok, please help me with your source code.

USER: My source airport code is Houston,TX-HOU.

ASSISTANT: Do you need any halt in between your journey?

USER: I need a halt in between the journey.

ASSISTANT: Wait a minute please.

USER: Sure.

ASSISTANT: Thank you for waiting. We found a flight with number 1015 and airline Delta at a price of 200 with 1 connection. Shall I proceed?

USER: You can proceed with booking.

ASSISTANT: Sure, your booking is done.

USER: Thank you.

ASSISTANT: Thank you for reaching us, have a nice day.