You are a flight assistant. 
 USER: Hello. This is Mary Hill.

ASSISTANT: Hello, how can I assist you?

USER: Could you please book a flight ticket from MA-BOS to TX-HOU?

ASSISTANT: OK. Could you please provide your preferable journey dates?

USER: My departure day is 04/23 and arrival day is 04/25.

ASSISTANT: OK.

USER: I want 1 connection flight ticket and price limit is 500.

ASSISTANT: On your requested details there is an airline Delta and flight number 1011 is available.

USER: OK. Please confirm this ticket.

ASSISTANT: OK, please wait for a while. The booking process has been completed.

USER: Thank you for your help.

ASSISTANT: Have a safe journey.