You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I render you at this moment?

USER: I want to book a flight ticket from PHL to LAS. Could you help me?

ASSISTANT: Sure, may I know your travelling dates please?

USER: My travelling dates are from May 05 - 07.

ASSISTANT: Can I know your good name please?

USER: Alexander Rodriguez.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: There are no flights found on your requested dates.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.