You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

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

ASSISTANT: Sure, may I know your departure and arrival dates?

USER: My travelling dates will be on Aug 7 to Aug 9.

ASSISTANT: May I know your connection limit?

USER: I need a direct flight.

ASSISTANT: Do you have any specifications?

USER: I want to depart in the evening.

ASSISTANT: May I know your name?

USER: Christine Hill here.

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

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for choosing us.