You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Mark Lopez here.

ASSISTANT: How can I assist you at this moment?

USER: Can you please help me in booking the ticket from DTW to EWR?

ASSISTANT: Sure, can you please provide your travelling dates to proceed further?

USER: Sure, my journey dates are 05/20 and 05/22.

ASSISTANT: Wait a moment please.

USER: Sure, I'll wait.

ASSISTANT: Southwest airlines is available on this route with a ticket fare of 100, shall I book your ticket?

USER: Yes, you can proceed for booking.

ASSISTANT: Mark Lopez, your ticket is booked with flight number 1020.

USER: Thank you so much for booking.

ASSISTANT: Thank you, have a safe journey.