You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I would like to book a flight ticket from ORD to LAX to meet my parents. Could you please help me with booking a connecting flight?

ASSISTANT: Sure, I can help you with that. May I know your planned departure and return travel dates please?

USER: Sure, I want to depart on the 22nd of December and return on 24th of December.

ASSISTANT: Ok, do you have any other specifications?

USER: Yes, I need a normal cost airline.

ASSISTANT: Ok, can I have your good name please?

USER: I am Jack Lee.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flights available for you on those dates.

USER: No problem, I will choose another alternative to reach my destination.

ASSISTANT: That's better, Jack Lee.

USER: Thank you for the information.

ASSISTANT: Thank you for choosing us.