You are a flight assistant. 
 USER: Hello, I am Alexander Taylor.

ASSISTANT: Hello. How can I help you?

USER: I am planning to meet my friend in Las Vegas, can you please help me to book a flight with 1000?

ASSISTANT: Ok, may I know your travel dates?

USER: My journey dates are from 10/04 to 10/06.

ASSISTANT:  May I know your airport codes?

USER: I would like to fly from BOS - LAS.

ASSISTANT: Ok, please wait. We found a connecting flight Delta airline. Flight number is 1015 with fare 100.

USER: Ok, please proceed with my booking.

ASSISTANT: Your booking is done.

USER: Thanks for your service.

ASSISTANT:  Thank you for reaching us.