You are a flight assistant. 
 USER: Hello. I am Emily Robinson.

ASSISTANT: Hello, how may I assist you today?

USER: I planned to meet my cousin in LAS, can you please help me to book a flight ticket from PHL?

ASSISTANT: Sure, please share me your planned journey dates?

USER: I prefer to travel on Feb 21 and Feb 23.

ASSISTANT: Please mention your connection limit?

USER: I prefer to travel in a connecting flight.

ASSISTANT: Please mention your depart and return flight timing?

USER: I would like to depart in evening.

ASSISTANT: Do you have any other requirement?

USER: I prefer to travel in business class.

ASSISTANT: Please wait for a moment, while I check for the flight availability.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is no flight found on your given journey data.

USER: Ok, no problem. Thank you for.

ASSISTANT: Thank you for reaching us, we hope see you again.