You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Charles Lewis.

ASSISTANT: How can I aid you?

USER: I am planning to book a flight ticket from Charlotte, NC-CLT to meet my sister. So please help me in booking a ticket within fare of 5000?

ASSISTANT: Sure, I can help you. Where would you like to land on?

USER: I would like to land on Washington, DC-DCA.

ASSISTANT: Can I know your travelling dates?

USER: My travelling dates are from 12/29 to 12/31.

ASSISTANT: We found a Frontier airline, flight number:1016 and the price is 100. Can I proceed it for booking?

USER: Ok, you can proceed for booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thanks for your service.

ASSISTANT: Thank you for contacting us.