You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: Can you help me to reserve a flight ticket from PHL to DEN?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: My travelling dates are 25 and 27 of Feb.

ASSISTANT: Ok, could I have your name please?

USER: I am Lisa Garcia.

ASSISTANT: Ok, do you need direct or connecting flight?

USER: I need a connecting flight.

ASSISTANT: The economy class with flight number 1012 of Delta airline is available having fare as 100 and connection as 0, is it ok for you?

USER: Please proceed .

ASSISTANT: Ok, your reservation is confirmed. The departure time is 4 AM and arrival time is 12 PM.

USER: Thanks for helping me.

ASSISTANT: You are welcome.