You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you now?

USER: I am Kevin Johnson.

ASSISTANT: Ok.

USER: I need to attend an event in Los Angeles. Can you book a ticket from PHL to LAX?

ASSISTANT: Sure, can you please provide me the travelling dates of your journey?

USER: I want to travel on 07/02 and 07/04.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry Kevin, there are no flights found on your requested dates.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Do you have any other plans to travel? Thank you for approaching us, have a nice day.