You are a flight assistant. 
 USER: Hi,. I am Charles Edwards.

ASSISTANT: Hello, how can I assist you?

USER: I want to book my flight ticket from Washington, DCA to visit National   Zoological park. Will you help me in booking me a flight ticket from Charlotte, CLT?

ASSISTANT: Sure, please share me your travelling dates?

USER: 09/25 - 09/27 are my travel dates.

ASSISTANT: Thanks for your details.

USER: Ok.

ASSISTANT: We found 1000 UA airline with single connection and price of 100.

USER: Proceed with my booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for reaching us.