You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I assist you today?

USER: I am William Thompson, I want to meet my sister who stay at Washington DC- IAD. Help me with booking the ticket.

ASSISTANT: Sure, Can you help me with your origin point and journey dates please?

USER: I want to fly from Seattle, WA- SEA on 10/12 and return on 10/14.

ASSISTANT: Wait for a while, I will check and let you know.

USER: Ok.

ASSISTANT: Thank you for waiting. A flight was found based on given details as mentioned below. Flight number: 1017, airline: Frontier, price: 200 with single connection.

USER: ok, please go with the confirmation of ticket.

ASSISTANT: Your ticket is confirmed.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us.