You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Please help me out in booking the ticket from LGA to SFO.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Let me know your travelling dates.

USER: My trip dates will be Oct 17 to Oct 19.

ASSISTANT: Is there any connection limit?

USER: I need a connecting flight.

ASSISTANT: Can I know your name?

USER: Brenda Lewis is my name.

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

USER: That's ok, thank you for checking.

ASSISTANT: Thank you.