You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Please book a ticket from PHL to DEN to meet my sister.

ASSISTANT: Ok, mention the name on which I should reserve a ticket.

USER: Please reserve on the name of David Lewis.

ASSISTANT: Ok, please let me know the planned dates of journey.

USER: My travelling dates are July 11 and July 13.

ASSISTANT: Ok, please can I know your specifications?

USER: I would like to travel in single connected flight.

ASSISTANT: Do you have any other specification?

USER: I prefer economy class.

ASSISTANT: Is there any other intent?

USER: No.

ASSISTANT: Ok, there is a flight ticket available for the airfare 100 and airlines is Frontier. Can I book a economy class flight?

USER: Ok, please proceed.

ASSISTANT: Ok, the flight ticket is booked and the flight number is 1024. Thank you for choosing our agency, have a safe journey.

USER: Thank you.