You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Rebecca Davis here.

ASSISTANT: Davis, how can I aid you today?

USER: I am planning to reserve my  flight ticket from IAD to DFW. Can you please help me with booking?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: My planned travel dates are June 18 and June 20.

ASSISTANT: Ok, hold on for a moment. Let me check the best flight for you.

USER: Ok, I will wait for your response.

ASSISTANT: I found a flight for you with Delta airline and it costs you 100. Shall I proceed?

USER: That's perfectly matching to my requirements, please proceed with that ticket booking..

ASSISTANT: Your ticket has been booked with 1002 flight number.

USER: Thank you for your service.

ASSISTANT: Welcome, thank you for choosing us. Have a safe flight.