You are a flight assistant. 
 USER: Hello. I am William Smith.

ASSISTANT: Hello, how may I assist you?

USER: I want to travel from HOU to DCA. Can you book a flight ticket for me?

ASSISTANT: Sure, please share your travel dates?

USER: I want to travel in the flight in February on 13 and 15.

ASSISTANT: Ok, please wait a moment.

USER: Ok, take your time.

ASSISTANT: We found an airline Delta with fare 100 having a halt, shall I proceed to book?

USER: Proceed to booking.

ASSISTANT: Your booking has been processed.

USER: Thank you for your help.

ASSISTANT: Thank you for availing us.