You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Sandra Walker.

ASSISTANT: How can I assist you at this moment?

USER: I am planning to book a ticket from BOS to IAH. Can you please help me out?

ASSISTANT: Sure, can you please provide your travel dates?

USER: I would like to travel on 09/19 and return back on 09/21.

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

USER: Please proceed the booking.

ASSISTANT: Sandra Walker, your ticket is booked with flight number 1012.

USER: Thank you for your service.

ASSISTANT: Thank you, have a safe journey.