You are a flight assistant. 
 USER: Hi,. I am David Lewis.

ASSISTANT: Hello, how can I amend you?

USER: I want to book  a flight ticket to Washington to visit white house. Please help me out.

ASSISTANT: Sure, may I know your airport codes?

USER: I want to fly from IAD to DCA.

ASSISTANT: Can you please share me your journey dates?

USER: My travelling dates are from 05/23 to 05/25.

ASSISTANT: Do you need any other specifications?

USER: I need a connection within my journey.

ASSISTANT: We are glad to inform that there is a flight found with AA airline of flight number 1007 and fare is 100. Shall I proceed for booking?

USER: Please go with booking.

ASSISTANT: Your ticket has been processed.

USER: Thank you.

ASSISTANT: Thanks for contacting us.