You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am Gary Evans. Please book a flight ticket on 08/06 to attend a seminar at Dallas & Fort Worth.

ASSISTANT: Ok, may I know your travelling airport codes?

USER: My airport codes are CA-LAX and TX-DFW.

ASSISTANT: Ok, may I know your return date?

USER: Yes, I would like to return on 08/08.

ASSISTANT:  Here is a direct flight with fare 100 and 1020 as flight number. Shall I proceed with booking?

USER: Yes, please.

ASSISTANT: Ok, your ticket is confirmed.

USER: Thank you.

ASSISTANT: Thank you for reaching us.