You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Can you aid me to book a flight ticket from LGA to PHL?

ASSISTANT: Sure, can you please let me know your travel dates?

USER: My travel dates are Sep 20 and Sep 22 respectively.

ASSISTANT: Do you have any connection limit?

USER: I prefer for single connecting flight.

ASSISTANT: Any other preferences?

USER: My depart should should be in the evening.

ASSISTANT: May I know your name?

USER: Brenda Wilson here.

ASSISTANT: Ok, please wait a minute.

USER: Ok.

ASSISTANT: Sorry, there were no flights found on your route.

USER: No issue, thank you.

ASSISTANT: Thank you.