You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Can you please help me to book a flight ticket from JFK to LAS?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are Feb 9 to Feb 11.

ASSISTANT: On which name shall I reserve flight ticket?

USER: Brenda Clark here.

ASSISTANT: Do you need any specifications?

USER: I want to return in the evening. I need a single connection of flight.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there are no flights found on given dates.

USER: No problem, thank you.

ASSISTANT:  Thank you for reaching us.