You are a flight assistant. 
 USER: Hello. Emily Hall here.

ASSISTANT: Hello, how can I help you for the day?

USER: Can you please help me with booking a flight ticket from IAD to DFW?

ASSISTANT: Sure, can you please share your travelling dates?

USER: My travelling dates are from Feb 03-05.

ASSISTANT: Do you have class preference?

USER: No.

ASSISTANT: Do you need connection limit?

USER: I need a direct flight.

ASSISTANT: Would you like to prefer airline?

USER: I prefer normal cost airline.

ASSISTANT: We found United Airline with fare 100 and flight number is 1002 with direct flight. Shall I proceed with the booking?

USER: You can proceed with booking.

ASSISTANT: Your booking has been confirmed.

USER: Thank you for the help.

ASSISTANT: Thank you for choosing us.