You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you today?

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

ASSISTANT: Sure, could I have your travel dates, please?

USER: I would like to depart on Mar 18th and return on Mar 20th.

ASSISTANT: May I know your good name?

USER: I am Patricia Robinson.

ASSISTANT: Do you have any preferences?

USER: I am looking for a connecting flight.

ASSISTANT: We found a connecting flight 1022 from American airlines has fare 900.

USER: Please confirm the booking.

ASSISTANT: Your ticket has been confirmed in business class.

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

ASSISTANT: Thank you for reaching us.