You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I want to travel from IAD to HOU. Can you help me to book a flight ticket?

ASSISTANT: Sure, please share me your trip dates.

USER: I want to fly in the flight on Apr 12 and Apr 14.

ASSISTANT: May I know your class preferences?

USER: No, but I want to return in afternoon time.

ASSISTANT: For booking, we need your good name. Please mention it.

USER: Sandra Lopez.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I am looking for a connecting flight.

ASSISTANT: We found a Hawaiian airline and 1007 is flight number with a fare of 200.

USER: Proceed to booking.

ASSISTANT: Shall I proceed?

USER: Yes.

ASSISTANT: Your ticket is confirmed with an economy class.

USER: Thank you for your help.

ASSISTANT: Thank you for opting us.