You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am planning to travel from PHL to LAX, help me in booking a flight?

ASSISTANT: Can I know your travelling dates?

USER: My travelling dates are Apr 21 to 23.

ASSISTANT: Please let me know your connection limit?

USER: I prefer single connection flight.

ASSISTANT: May I know your name please?

USER: I am Susan Young.

ASSISTANT: Please wait.

USER: Ok.

ASSISTANT: Sorry, no flights available on your route.

USER: That's ok, thank you.

ASSISTANT: Thank you for choosing us.