You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: Can you please help me in booking my flight ticket from IAD to IAH?

ASSISTANT: Sure, can you share your trip dates?

USER: My trip dates are Apr 18 and Apr 20.

ASSISTANT: Do you have any preferences?

USER: I need connecting flight.

ASSISTANT: May I know your name?

USER: Myself Samuel Parker.

ASSISTANT: There is a connecting light with number 1007 in airline UA, the fare is 100 in economy class. Can I book it?

USER: Please proceed with booking.

ASSISTANT: Your ticket is reserved.

USER: Thank you for your help.

ASSISTANT: Thank you for opting us.