You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to attend a Seminar in Charlotte. Can you please help me for booking the flight ticket?

ASSISTANT: Can I know your travel dates?

USER: My travelling dates are Jan 09 and Jan 11.

ASSISTANT: Do you have any class preference?

USER: I am comfortable with any class.

ASSISTANT: Is there any connection limit?

USER: I prefer single connecting flight.

ASSISTANT: Let me know your travelling codes.

USER: My airport codes are LAS and CLT.

ASSISTANT: Can I know your name?

USER: My name is Elizabeth Hernandez.

ASSISTANT: Sorry, no flights found for your travelling dates.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you.