You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I have an appointment with a lawyer. So kindly book a ticket from DCA to DFW.

ASSISTANT: Sure, let me know your travelling dates.

USER: My journey dates are as follows May 29 and May 31.

ASSISTANT: Do you have any limits on number of connections?

USER: I like to board a direct flight.

ASSISTANT: Is there any other specifications?

USER: I have no other preferences.

ASSISTANT: Can I get your name?

USER: My name is Andrew King.

ASSISTANT: We found a direct flight with Frontier airlines and flight number is 1015. Shall I proceed?

USER: Please proceed.

ASSISTANT: Your ticket has been confirmed with economy class.

USER: Thank you for the help.

ASSISTANT: Thank you for choosing us.