You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How could I aid you?

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

ASSISTANT: Sure, can you please share on what dates you have planned to travel?

USER: I prefer to travel on May 3 and May 5.

ASSISTANT: Please provide your specifications.

USER: I would like to depart in afternoon.

ASSISTANT: May I know your name please?

USER: I am Ashley Johnson.

ASSISTANT: Unfortunately there is no flight found with your given information.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you.