You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I want to book a ticket from ORD to LGA.

ASSISTANT: Can I know your travelling dates?

USER: Depart is on Apr, 21 and return will be Apr, 23.

ASSISTANT: Please let me know your connection limit?

USER: I would prefer direct flight.

ASSISTANT: Do you have any other preference?

USER: No.

ASSISTANT: May I know your name?

USER: My name is Dennis Garcia.

ASSISTANT: Sorry, no flights available your route.

USER: Thank you.

ASSISTANT: Thank you for reaching us.