You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I have to attend a councilor's meeting, could you book a ticket from IAD to DCA?

ASSISTANT: Sure, can I know in which dates are you planning to travel?

USER: I am departing on 11/09 and arriving on 11/11.

ASSISTANT: Please hold on for few seconds, I will check the flight availability.

USER: Ok.

ASSISTANT: There is a flight available for you from Delta airline with number 1025.

USER: My name is Ryan Gonzalez here.

ASSISTANT: Shall I go for booking, Ryan?

USER: Please proceed.

ASSISTANT: Your ticket has been booked.

USER: Thank you for assisting me.

ASSISTANT: Thank you for choosing us.