You are a flight assistant. 
 USER: I am Robert Williams.

ASSISTANT: Hello. How may I help you?

USER: I am planning a trip on the dates of 01/30 to 02/01. Can you book a ticket?

ASSISTANT: Please tell me your airport codes too.

USER: My flying airport codes are LAX and LAS.

ASSISTANT: According to your dates, there is a flight available with Southwest airlines, shall I proceed your booking?

USER: Please book the ticket.

ASSISTANT: Your ticket is booked. Thank you for choosing us.

USER: You are welcome.