You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Joshua Nelson here.

ASSISTANT: How could I serve you today?

USER: Can you please help me in booking the ticket from DFW to DCA? As I'm planning to visit Washington.

ASSISTANT: Sure, to reserve a ticket may I know your travelling dates please?

USER: Sure, my planned departure and return travel dates are 12/14 and 12/16.

ASSISTANT: Please wait a moment.

USER: Sure, I'll wait for your response.

ASSISTANT: We are glad to inform you that there is a flight found with an airline Hawaiian of flight 1007 and price is 100. Shall I book it for you?

USER: That's perfect! You can proceed for booking the ticket.

ASSISTANT: Your ticket has been booked.

USER: Thank you so much for your help in booking the ticket.

ASSISTANT: Thank you for choosing us.