You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I provide assistance to you?

USER: I am William Carter. I want to book a flight ticket from BOS to IAD. Can you help me?

ASSISTANT: Sure, we are willing to help you. Please share me your preferable dates so that I can check the availability of flights.

USER: 08/17 and 08/19 are my travelling dates.

ASSISTANT: Do you have any other specifications?

USER: I need a flight ticket with in 200.

ASSISTANT: Ok, give me sometime to find a best flight for you.

USER: Ok.

ASSISTANT: Thank you for your time, we have a connecting flight in flight number 1011 with price 100.

USER: You can reserve it.

ASSISTANT: Your booking has been done in Hawaiian airline.

USER: Thank you.

ASSISTANT: Thank you for selecting our service.