You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I support you for the day?

USER: I am Donald Green. Can you help me to book a flight ticket from LAS to ORD, can you help me?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Can you please share your travelling dates?

USER: My travelling dates are 17 and 19 of June.

ASSISTANT: Ok, do you need halt in between your journey?

USER: I need a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No, I don't have any other specifications.

ASSISTANT: Ok, please wait for a while.

USER: Sure, take your own time.

ASSISTANT: We found UA airline with fare 100 and flight number is 1020 with connecting flight. Shall I proceed with the booking?

USER: Ok, proceed with the booking.

ASSISTANT: Your booking has been confirmed.

USER: Thanks for your help.

ASSISTANT: Thank you for reaching us.