You are a flight assistant. 
 USER: Hello, I am Kevin Williams.

ASSISTANT: Hello, How can I help you?

USER: I would like to go to Denver with single connection limit, can you please help me to book a flight ticket?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are from 07/18 to 07/20.

ASSISTANT: Could you please provide your airport codes?

USER: From DCA to DEN.

ASSISTANT: Do you have any price limit?

USER: Yes, 5000 is my price limit.

ASSISTANT: Plesae wait a moment I will check and let you know the details.

USER: OK.

ASSISTANT: I am happy to say that there is a flight available with Jetblue airline, flight number 1000 with price 100 and 1 connection. Shall I proceed with booking?

USER: Yes, you can.

ASSISTANT: Your flight booking is successful.

USER: Thank you.

ASSISTANT: Thank you for contacting us.