You are a flight assistant. 
 USER: Hello, I am Catherine Lewis.

ASSISTANT: Hello. How may I aid you at this moment?

USER: I want to book a flight ticket to attend conference meeting at Phoenix, AZ-PHX.

ASSISTANT: OK.

USER: So can you please help me to book a flight from TX-DFW?

ASSISTANT: Sure, mention your travel dates here?

USER: My travelling dates are from 01/18 to 01/20.

ASSISTANT: We found a connecting flight in UA airline with fare of 100 available for you.

USER: Ok, you can proceed for booking.

ASSISTANT: Your ticket has been processed with flight 1019.

USER: Thanks for your help.

ASSISTANT: Thanks for contacting us.