You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I help you?

USER: Can you find a flight for me from LAX to PHL?

ASSISTANT: Sure, May I know your travelling dates?

USER: Ok, my preferable dates are from Apr 17 to 19.

ASSISTANT: Do you have any connection limit?

USER: I need a flight in economy class with 1 connection.

ASSISTANT: May I know your name?

USER: Sure, I am Larry Adams.

ASSISTANT: Sorry, There are no flights found with your details.

USER: It's ok, thank you.

ASSISTANT: Thank you.