You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: Please can you book a flight ticket from LAS to OAK?

ASSISTANT: Sure, I am glad to help you in booking. Can you please share your travel dates?

USER: Ok, the dates of my journey are Jan 11 and 13th.

ASSISTANT: May I know your connection limit?

USER: Yes, I need a connecting flight.

ASSISTANT: Do you have any airline preference?

USER: I need a normal cost airlines.

ASSISTANT: Can you please tell me your name?

USER: Please book a economy class flight on the name Elizabeth Collins.

ASSISTANT: Sorry, no flights are available on your preferable travel dates.

USER: That is ok, thank you for assisting me.

ASSISTANT: Thank you for reaching us, have a nice day.