You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I would like to book a flight ticket from JFK to ATL to meet my friends.

ASSISTANT: Can I know your travelling dates?

USER: Sure, my travelling dates are May 11 and May 13.

ASSISTANT: Is there any airline preference?

USER: No, I am comfortable with any airline.

ASSISTANT: Do you have any preference?

USER: I prefer to travel in a connecting flight.

ASSISTANT: Let me know your name.

USER: I am Sarah Williams.

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

USER: No worries, thank you for the information.

ASSISTANT: Thank you.