You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Alexander Nelson. I want to book a ticket from DEN to DCA to attend seminar, can you help me in booking?

ASSISTANT: Yes, can you share me your travelling dates?

USER: I am departing on Aug 19 and return on Aug 21.

ASSISTANT: Give me a moment.

USER: Sure, take your time.

ASSISTANT: I have found an economy class ticket with a price of 100 and 1 connection.

USER: Please proceed for booking.

ASSISTANT: Ok, your ticket is booked.

USER: Thank you for your help.

ASSISTANT: Thank you for contacting us.