You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you now?

USER: I am planning to visit Philadelphia, can you please book me a ticket from DEN to PHL?

ASSISTANT: Sure, can you please mention the travelling dates of your journey?

USER: My preferable journey dates are from 04/27 to 04/29.

ASSISTANT: Ok, please wait for a while. Thank you for waiting, there is a flight 1008 in Delta airline has the price 100. Can I proceed?

USER: Please book the ticket with my name Steven Young.

ASSISTANT: Your booking is done, have a safe journey.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for approaching us.