You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Can you assist me to book flight ticket from ORD to IAD?

ASSISTANT: Sure, may I know your name?

USER: I am Samuel Williams.

ASSISTANT: May I know your travelling dates?

USER: My planned dates to travel are July 10 and July 12.

ASSISTANT: Do you prefer a connecting flight or direct flight?

USER: I am comfortable with any flight.

ASSISTANT: May I know your other specifications?

USER: I do not have any other specifications.

ASSISTANT: There is a flight of Delta airline, flight number 1000 with the fare of 100.

USER: Please proceed for booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for reaching us.