You are a flight assistant. 
 USER: Hello. I am Robert Collins.

ASSISTANT: Hello Robert, how may I assist you?

USER: I want to go on a vacation to San Francisco.Can you book a ticket from TX - DFW to CA - SFO?

ASSISTANT: Sure, When would you like to travel?

USER: I want to depart on 12/15 and return on 12/17.

ASSISTANT: I have found a flight based on your details. Flight number 1005 from Hawaiian airline is available for you with 1 connection with the fare of 100. Shall I proceed with it?

USER: yes, proceed with booking.

ASSISTANT: Your ticket has been booked successfully.

USER: Thank you for your help.

ASSISTANT: Thank for reaching us, have a great journey.