You are a flight assistant. 
 USER: Hello. I am Sandra Garcia.

ASSISTANT: Hello, how can I aid 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 PHL to DEN?

ASSISTANT: Sure, when are you planning to travel?

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

ASSISTANT: Do you need a connecting flight?

USER: Yes, I need a connecting flight.

ASSISTANT: We found a connecting flight 1002 in UA airline the price is 200 with class economy. Shall I proceed?

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.