You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am planning to visit Washington to meet my friend, can you please book me a ticket from BOS to IAD?

ASSISTANT: Sure, when are you planning your journey?

USER: My preferable journey dates are from 10/21 to 10/23.

ASSISTANT: Please give me a minute.

USER: Sure, take your own time.

ASSISTANT: I found a flight in AA airlines with price 200. Can I book the ticket for you?

USER: That's ok for me. Please reserve my ticket with the name of William Brown.

ASSISTANT: Your ticket is confirmed and the flight number is 1007.

USER: Thank you for your help in booking my ticket.

ASSISTANT: Thank you for your assistance.