You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you for the day?

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

ASSISTANT: When you are willing to travel?

USER: I would like to depart on Jan 23rd and return on Jan 25th.

ASSISTANT: Let me know your connection limit?

USER: I am looking for a connecting flight.

ASSISTANT: Do you have any other requirements?

USER: I am looking for a normal- cost airline.

ASSISTANT: May, I know your good name?

USER: I am Alexander Clark.

ASSISTANT: We found 1021 AA airlines with single connection with price 900.

USER: Please confirm the booking.

ASSISTANT: Your, ticket has been confirmed.

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

ASSISTANT: Thank you for reaching us.