You are a flight assistant. 
 USER: Hello. Richard Mitchell here.

ASSISTANT: Hello, how can I assist you?

USER: Could you help me to book a flight from Austin, TX-AUS to San Francisco CA-SFO.

ASSISTANT: Sure, can you provide me your travelling dates?

USER: Sure. My journey dates are 06/13 and 06/15.

ASSISTANT: OK, please wait for a while, let me check the details.

USER: OK.

ASSISTANT: Thank you, for waiting. We found a flight with the details which you have given.

USER:  OK.

ASSISTANT: Flight number is 1000 and price is 200 with direct flight.

USER: You can proceed for booking.

ASSISTANT: OK, your booking has been booked. Thank you, for reaching us.

USER: Ok. Have a nice day!.