You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: My name is Jerry Gonzalez. I want to attend a birthday party in Philadelphia, could you help me in booking the ticket?

ASSISTANT: Can I know your travel airport codes?

USER: It's from LAS to PHL. The dates of travel are from 04/13 to 04/15.

ASSISTANT: Give me a minute.

USER: Please make sure the connection is 1.

ASSISTANT: Sorry Jerry, there are no flights available with 1 connection limit.

USER: That's ok. Thank you for your time.

ASSISTANT: Welcome.