You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to travel to MI - DTW for my sister marriage. So, it's very important for me to attend it. Can you please book me a ticket for me?

ASSISTANT: Sure, may I know your dates of travel for your sister's marriage?

USER: It is on 10/23 and I have to return back to TX - HOU on 10/25.

ASSISTANT: OK, please hold on to check the available ticket.

USER: OK.

ASSISTANT: The flight with airline AA and flight number 1007 with connections limit is 1 and price limit is 700. Shall I proceed to book?

USER: Is there any flight costs 200?

ASSISTANT: Sorry, there is flight costs with 700.

USER: No, I don't want to book it for me.

ASSISTANT: OK, may I know your name please?

USER: I'm Lisa Miller. Any have thank you for all your information.

ASSISTANT: OK, thank you for consulting us Lisa.