You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you now?

USER: I need you to book a flight ticket from PHL to SEA. Please help me.

ASSISTANT: Sure, I will help you with booking.

USER: Thank you.

ASSISTANT: Please share me when your planned to travel?

USER: June 26 and 28 are my planned travelling dates.

ASSISTANT: Do you want a connecting flight?

USER: I would like to have a break in my journey.

ASSISTANT: Is there any other requirement related to booking?

USER: I would prefer to return in the evening.

ASSISTANT: May I know your good name?

USER: My name is Joseph Lee.

ASSISTANT: Thank you for the details, sorry there is no flight found on your given journey dates.

USER: That's ok. Thank you.

ASSISTANT: Thank you for visiting us.