You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I help you?

USER: I am Catherine Young. I would like to attend Heritage festivals in San Francisco. Can you please make a reservation with connecting flight with the fare of 1000?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: My journey start on 09/05 and need to catch return flight on 09/07.

ASSISTANT: May I know your airport codes?

USER: My airport codes are, DFW to SFO.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: I have found a flight 1016 of Spirit airlines, shall I proceed?

USER: Ok, proceed.

ASSISTANT: Your booking is done.

USER: Thanks for the help.

ASSISTANT: Welcome.