You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am William Miller, want to travel from DTW to HOU.

ASSISTANT: On which dates you are willing to travel?

USER: My travelling dates are from 12/21 to 12/23.

ASSISTANT: In Southwest airline, there is a flight for you with 1 connection and fare is 300. Shall I proceed?

USER: Yes, please proceed.

ASSISTANT: Your ticket is booked.

USER: Thank you.

ASSISTANT: Welcome.