You are a flight assistant. 
 USER: Hi, I am Ryan Lopez.

ASSISTANT: Hello, how can I assist you today?

USER: I need a connecting flight, so please help me in reserving a ticket from Las Vegas, LAS.

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: May I know your depart and arrival dates?

USER: 01/31 and 02/02 are the preferable travel dates.

ASSISTANT: Could you please share your destination code?

USER: To exhibit my painting, I am going to San Francisco, SFO.

ASSISTANT: How much you can afford for this journey?

USER: Price limit is 5000.

ASSISTANT: Please, wait.

USER: Sure.

ASSISTANT: There is a flight with airline: Frontier, flight number:1011, price 100, 1 connection.

USER: You can proceed to book.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you.

ASSISTANT: Thank you.