You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you today?

USER: I am Benjamin Thompson. I am planning to enjoy my holidays at Washington, IAD. Can you please book a ticket from Detroit, DTW?

ASSISTANT: Sure, may I know your travelling dates?

USER: Journey dates are 05/19 to 05/21.

ASSISTANT: There is flight of frontier airline, flight number as 1000 with the fare of 200. Shall I proceed?

USER: You can proceed.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for opting us.