You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you for the day?

USER: I would like to attend for sports festival at Philadelphia. Can you reserve me a flight ticket from LAS to reach PHL?

ASSISTANT: When you are willing to travel?

USER: I am willing to travel on Apr 27 and again return on Apr 29.

ASSISTANT: Do you have any connection limit?

USER: I prefer a flight having maximum connection of one.

ASSISTANT: May, I know your good name?

USER: I am Robert Mitchell.

ASSISTANT: Do you have any other requirement.

USER: I need an economy class ticket.

ASSISTANT: Sorry, we found no flights on your given dates.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for reaching us.