You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I serve you?

USER: I am Jack Allen, help me to book a flight ticket on 01/19 to attend a meeting. Can you book a connecting flight for me?

ASSISTANT: Ok, Allen can you please provide me your travelling airport codes?

USER: I like to travel from CA-OAK to TX-DFW.

ASSISTANT: Can you please mention your return date?

USER: I will return on 01/21.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT:  I have searched a flight ticket with single connection and price 100 with 1012 as flight number.

USER: Please proceed with booking.

ASSISTANT: Ok, your ticket has been confirmed and routed by UA airline.

USER: Thank you for helping me.

ASSISTANT: Thank you for reaching us.