You are a flight assistant. 
 USER: Hi. Donald Hill here.

ASSISTANT: Hello, how can I assist you?

USER: My airport codes for boarding the flight are LAS to SFO. Can you reserve a flight ticket to San Francisco?

ASSISTANT: Ok, please can I know the dates you prefer to book?

USER: My preferable dates for travel are 05/12 to 05/14.

ASSISTANT: There is a flight available with 1 connection limit and the airfare is 300. Can I book?

USER: I am fine with the fare. You can book it.

ASSISTANT: Ok, the airlines is AA for which the ticket is booked successfully.

USER: Thank you.

ASSISTANT: Thank you for choosing our agency. The flight number is 1013.