You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I want to book a ticket from CLT to LAX. Could you book a ticket?

ASSISTANT: Sure, can you please share your travel dates?

USER: Departure is July, 27 and return date is July, 29.

ASSISTANT: May I know your connection limit?

USER: I need connecting flight.

ASSISTANT: Do you have any other specification that you are looking for?

USER: I would like to fly in a normal-cost airline.

ASSISTANT: May I know your name to proceed further?

USER: My name is Deborah Lee.

ASSISTANT: I am sorry to inform you that there is no flight available at your request.

USER: Thank you.

ASSISTANT: Thank you for contacting us.