You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am planning to book a flight ticket to BOS from LAX, can you please help me out?

ASSISTANT: Sure, I am happy to assist you. Could you please let me know your travel dates?

USER: Sure, my planned travelling dates are Apr 19 and Apr 21.

ASSISTANT: Ok, can you please tell us your name?

USER: Sure, my name is  Brandon Martinez.

ASSISTANT: Thank you. Please provide us your class preference.

USER: No issues with class.

ASSISTANT: Ok, please stay online for a moment. I will check for the available flights and let you know. Flight-1017 having single connection is available in Spirit airlines and the ticket fare is 100 only in economy class. Flight departs at 8:00 hours and arrives at 18:00 hours. Shall I book the ticket for you?

USER: My depart time must be in afternoon.

ASSISTANT: Ok, please wait for a while. Let me check.

USER: Ok, take your time.

ASSISTANT: There is a flight with single connection in Delta airlines and the ticket costs you 100 only in economy class. Flight departs at 19:00 hours and arrives at 7:00 hours. Shall I book the ticket for you?

USER: Ok, please proceed.

ASSISTANT: Your ticket is booked successfully and your flight number is 1019.

USER: Thank you for the help.

ASSISTANT: You are most welcome.