You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you at this moment?

USER: I am planning to visit Olympic National Park at Washington, could you please help me with booking a flight ticket from HOU to DCA?

ASSISTANT: Sure, can you please share your journey dates?

USER: I would like to depart on Nov 26th and return on Nov 28th.

ASSISTANT: Do you have any connection limit?

USER: I am looking for a connecting flight.

ASSISTANT: Are there any more specifications?

USER: I have no other specifications.

ASSISTANT: May I know your name please?

USER: I am Karen Miller.

ASSISTANT: We found a connecting flight with Delta airlines, flight number 1013, and the fare of 100. Shall I proceed?

USER: Please confirm the booking.

ASSISTANT: Your ticket has been reserved in economy class.

USER: I really appreciate your help, thank you for your service.

ASSISTANT: Thank you for choosing us.