You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I planned to meet my friend in DFW, can you please help me to book a flight ticket from IAD?

ASSISTANT: Sure, please share your journey dates?

USER: I prefer to travel on Jan 11 and Jan 13.

ASSISTANT: Do you have any specifications?

USER: No.

ASSISTANT: May I know your good name?

USER: I am Emily Moore.

ASSISTANT: We found a flight in Delta airlines, flight number is 1001 with single connection and price is 200 economy class. Shall I proceed?

USER: Ok, please confirm my booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.