You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Please help me to book a flight ticket from LAS to OAK.

ASSISTANT: Sure, please provide your travelling dates.

USER: My journey dates are from July, 13 to July, 15.

ASSISTANT: Ok, Do you have any class preference?

USER: No.

ASSISTANT: Ok, please let me know your connection limit.

USER: I need a single connecting flight.

ASSISTANT: Ok, Is there any other preferences?

USER: No.

ASSISTANT: We found a connecting flight in 1026 American Airlines with a fare of 200. Can I proceed for booking?

USER: Please proceed.

ASSISTANT: Please provide your name.

USER: Dorothy Wright.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for choosing us.