You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Shirley Carter, want to travel from PHL to DEN. Can you please help me?

ASSISTANT: Sure, may I know your travelling dates?

USER: My trip dates are from 07/15 to 07/17.

ASSISTANT: Do you have any other specifications?

USER: Make sure, my return time should be afternoon with 1 connection.

ASSISTANT: Can I know your class preference?

USER: No, I am fine with any class.

ASSISTANT: Wait a minute.

USER: Ok.

ASSISTANT: There is a flight on frontier airline, flight number 1015 with the fare of 100. Shall I proceed for booking?

USER: Please proceed.

ASSISTANT: Your ticket has been booked.

USER: Thank you.