You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to book a flight ticket from WA - SEA to DC - DCA. Could you help me in booking?

ASSISTANT: Sure, I am here to assist you.

USER: Thank you.

ASSISTANT: May I know when are you willing to travel?

USER: My travelling dates are from 06/29 to 07/01.

ASSISTANT: Do you need any connecting flight?

USER: I need single connecting flight.

ASSISTANT: We have a flight from Hawaiian airline number 1017 and price is 500. Shall I proceed?

USER: Yes, please proceed.

ASSISTANT: May I know your name?

USER: Nicole Perez here.

ASSISTANT: Your seat is reserved in business class.

USER: Thank you for helping me.

ASSISTANT: Thank you for contacting us.