You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I have planned to visit all the places in Washington with my cousin, so please assist me in booking a flight to IAD.

ASSISTANT: Sure, we are pleased to serve you.

USER: Thank you.

ASSISTANT: May I know your itinerary dates?

USER: Sure, my planned dates are 11th and 13th in December month.

ASSISTANT: Is there any class preference for you?

USER: I need a flight in economy class.

ASSISTANT: Do you need any way station in your journey?

USER: I need a single connection.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: Can you share me your boarding point?

USER: My boarding airport code is PHL.

ASSISTANT: There is a connecting flight with fare of 200 and 1029 flight number. Shall I proceed?

USER: Ok, you can proceed.

ASSISTANT: To confirm the booking, may I know your good name?

USER: Sure, this is Frank Johnson.

ASSISTANT: Your seat has been reserved with Delta Airlines in economy class.

USER: Thank you.

ASSISTANT: Thank you for reaching us.