You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Gary Perez, want to travel from CLT to EWR. Please help me in booking my ticket.

ASSISTANT: Sure, let me know your travelling dates.

USER: My travelling dates are from 07/13 to 07/15.

ASSISTANT: Can you please share your connection limit?

USER: I need to travel in direct flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Unfortunately, there are no flights found based on your details.

USER: It's ok, thank you.

ASSISTANT: Thank you for choosing us.