You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you at this moment?

USER: Can you help me in booking a flight ticket from PHL to LAX?

ASSISTANT: Sure, on which dates would you like to book a flight ticket?

USER: I want to travel on 08/15, and return on 08/17.

ASSISTANT: Sure, may I know your class preference?

USER: I am comfortable with any class.

ASSISTANT: Ok, do you need a lay by in between the journey?

USER: I need a single connection.

ASSISTANT: DO you have any other specifications?

USER: I want to return in the afternoon time.

ASSISTANT: May I know your good name please?

USER: I am Thomas Hernandez.

ASSISTANT: There are no flights found on your requested dates.

USER: Ok, no issues.

ASSISTANT: Thank you for reaching us.

USER: Thanks for the information.