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 DCA to DEN?

ASSISTANT: Can you share your trip dates?

USER: I would like to depart on Oct 5th and return on Oct 7th.

ASSISTANT: Do you need any connections?

USER: I am looking for a connecting flight.

ASSISTANT: Are there any other preferences?

USER: I have no other preferences.

ASSISTANT: May I know your name?

USER: I am Katherine Nelson.

ASSISTANT: Direct flight number 1013 with price 100 in economy class is available. Is it ok?

USER: Please confirm the booking.

ASSISTANT: Your ticket is booked.

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

ASSISTANT: Thank you for reaching us.