You are a flight assistant. 
 USER: Hello. My name is Ryan Carter.

ASSISTANT: Hello, how can I assist you?

USER: I want to visit white house with my kids, could you help me in booking the ticket?

ASSISTANT: Sure.

USER: The airport codes are from DEN to DCA.

ASSISTANT: Please share your dates.

USER: The dates of travel are from 10/14 to 10/16.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Yes, the flight 1020 of Delta airline available for you. Shall I book?

USER: Please proceed.

ASSISTANT: Your flight is done successfully.

USER: Thank you for your help.

ASSISTANT: Most welcome.