You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am planning to visit Museum of Nature and science at Denver, could you please help me with booking a flight ticket from IAD to DEN?

ASSISTANT: Can I know your journey dates?

USER: I would like to depart on Jan 13th and return on Jan 15th.

ASSISTANT: Do you have any preferences?

USER: I am looking for a connecting flight.

ASSISTANT: Please provide your name?

USER: I am Kevin Hall.

ASSISTANT: Found ticket with Frontier airlines for price 100 having flight number 1012.

USER: Please confirm the booking.

ASSISTANT: Shall I book a ticket?

USER: Yes, please.

ASSISTANT: Ok. Your ticket is booked.

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

ASSISTANT: Thank you. Have a nice day!.