You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: Jacob Smith here. I am a doctor, I need to attend a surgery at Washington. Please book a ticket from IAD to DCA.

ASSISTANT: Sure, I will help you to book a flight. Can you please share me your travelling dates?

USER: My planned travel dates are 11/19 and 11/21.

ASSISTANT: Please give me a moment.

USER: Sure, take your time.

ASSISTANT: Here, I found a flight for you with single connection.+.

USER: Ok, please book my ticket.

ASSISTANT: Your ticket is booked with flight number 1008 and airline is Delta.

USER: Thank you for your response.

ASSISTANT: Welcome, have a nice day. Thank you for choosing us.