You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I want to book a flight ticket from DEN to LGA. Can you help me in booking?

ASSISTANT: Sure, do you have any limits on number of connections?

USER: Yes, I need a direct flight.

ASSISTANT: Please share your travelling dates.

USER: My travelling dates are from Sept 27 to Sept 29.

ASSISTANT: Do you have any specifications?

USER: No.

ASSISTANT: May I know your name?

USER: My name is Susan Martinez.

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

USER: Ok, No issues.

ASSISTANT: Thank you for choosing us.

USER: Thank you.