You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Eric Evans here. Can you book me a ticket from IAD to LAX?

ASSISTANT: Can I know your travel dates?

USER: Ok, here are my preferred travelling dates 06/05 and 06/07.

ASSISTANT: The flight 1016 of UA airlines is available on your requested dates with a price of 100. Shall I proceed?

USER: Please proceed with the booking.

ASSISTANT: Evans, your ticket is booked successfully.

USER: Thank you for the help.

ASSISTANT: You are welcome.