You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I best render you?

USER: I am Daniel Davis. I have planned to attend my sister's birthday party at Washington, DC - IAD. Can you please book a ticket from DCA?

ASSISTANT: Sure, do you need any whistle stop in between journey?

USER: I need a whistle stop in my journey.

ASSISTANT: When do you planned your schedule dates?

USER: I planned to depart on 06/10 and return on 06/12.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: There is a flight found with Delta airline of flight number 1020 and fare is 100. Shall I proceed for booking?

USER: Please poceed.

ASSISTANT: Your ticket has been booked.

USER: Thanks for helping me.

ASSISTANT: Thanks for contacting us.