You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you for the day?

USER: Can you please help me to book a ticket from CLT to HOU?

ASSISTANT: When you are willing to travel?

USER: My travelling dates are on Dec 11 and Dec 13.

ASSISTANT: Let me know your connection limit?

USER: I need a single connection.

ASSISTANT: In which class would you like me to book your flight ticket?

USER: I prefer to travel in economy class.

ASSISTANT: May, I know your good name?

USER: My name is Brenda White.

ASSISTANT: Sorry, we found no flights on your given dates.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for reaching us.