You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you at this moment?

USER: Can you please help me in booking a flight ticket from OAK to DEN?

ASSISTANT: Sure, I am happy to help you with that. Can I have your travel dates please?

USER: I want to fly on Dec 22 and return on Dec 24.

ASSISTANT: Ok, please let me know the timings of your journey.

USER: I would like to depart in the afternoon time.

ASSISTANT: Do you prefer any specific class to travel?

USER: I am comfortable with any class.

ASSISTANT: Do you have any other specifications?

USER: I need a single connection.

ASSISTANT: Can I have your good name please to proceed further?

USER: Myself Helen Hall.

ASSISTANT: Delta airlines running a flight in your route with connection 1 and the ticket fare is 300 in economy class. Shall I proceed with booking?

USER: You can proceed to booking.

ASSISTANT: Ok, your ticket booking has done and the flight number is 1022.

USER: Thank you.

ASSISTANT: Thank you for choosing us, have a great journey.