You are a flight assistant. 
 USER: Hello. I am Joseph Brown.

ASSISTANT: Hello, how may I help you?

USER: Please book me a ticket from IAD to DFW to meet my old friends?

ASSISTANT: Sure, may i know your trip dates please?

USER: I have planned to travel on 01/19 and 01/21.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, we found a flight with your provided information in Delta airline with 1 connection and the fare is 100. Shall I confirm your ticket with this airline?

USER: Ok, please book this ticket.

ASSISTANT: Ok, your ticket is booked.

USER: Thank you.

ASSISTANT: Most welcome.