You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I would like to visit Philadelphia, please help me in booking a ticket from DEN to PHL.

ASSISTANT: Yes, can you tell me your dates of travel?

USER: My planned travel dates are on Mar 1 and Mar 3.

ASSISTANT: Do you have any other preferences?

USER: I need a connecting flight.

ASSISTANT: Give me a moment.

USER: Sure, take your time.

ASSISTANT: I have found an economy class ticket with a price of 100 and 1 connection.

USER: Ok, please proceed for booking.

ASSISTANT: Can I know your name for booking?

USER: My name is Sarah Smith.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thank you for contacting us.