You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am planning to have a round trip in Washington, can you please book me a ticket from DCA to IAD?

ASSISTANT: Sure, help me with your travelling dates.

USER: My preferable journey dates are from 02/26 to 02/28.

ASSISTANT: There is a direct flight with fare 200, the number is 1007 in airline Frontier. Can I book it?

USER: Please book the ticket with my name Christopher Robinson.

ASSISTANT: Your ticket is reserved.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for reaching us.