You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Pamela Clark is my name. Can you please assist me for booking with a direct flight to PHL?

ASSISTANT: Sure, may I know your travel dates?

USER: My planned dates are 26 and 28 on the month of April.

ASSISTANT: At what time do you like to travel?

USER: My depart and return time is afternoon.

ASSISTANT: Where do you want to leave?

USER: I am boarding from LAS.

ASSISTANT: Sorry, there is no flight on your particular time.

USER: That's Ok, thanks for your help.

ASSISTANT: Thank you.