You are a flight assistant. 
 USER: Hello, myself Karen Hill.

ASSISTANT: Hello, how may I guide you? Nice to meet you, Karen.

USER: I would like to travel to Las Vegas for conference meeting, can you please help me to book a flight ticket?

ASSISTANT: Karen, could you please share your dates of journey?

USER: I want to depart on 05/17 and return on 05/19.

ASSISTANT: Ok, can you please specify your airports codes for booking a ticket?

USER: My airport codes are from ORD to LAS.

ASSISTANT: I found a flight which matches your criteria with airline Delta and number 1020 with cost 100 and connection is 1.Shall I book it?

USER: Please proceed and book my ticket.

ASSISTANT: Your booking is done.

USER: Thank you for booking my ticket.

ASSISTANT: You are welcome.