You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: Myself Susan Clark. I planned to visit my relatives.Could you please help me in booking a ticket?

ASSISTANT: Sure, I can help you with that. Susan, can you please help me with your travelling dates?

USER: My travelling dates are from 12/15 to 12/17.

ASSISTANT: Could you please provide the source and the destination airport codes?

USER: My airport codes are from DFW to LAX.

ASSISTANT: Ok, let me check for the availability of flight.

USER: Sure.

ASSISTANT: Susan, there is a flight available with price 100.Would you like me to proceed the booking?

USER: Sure, please confirm my ticket.

ASSISTANT: Sure. I have successfully booked your flight ticket and the fight number is 1018 with UA airline.

USER: Thank you for helping me in booking a ticket.

ASSISTANT: You are welcome. Thank you for contacting us.