You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Karen Moore.

ASSISTANT: How can I assist you?

USER: Can you please help me to find a flight from Seattle to Philadelphia?

ASSISTANT: Sure, I am happy to help you. Please help me with your travelling dates.

USER: Thank you. I have planned to travel on the dates of Apr 23 and Apr 25.

ASSISTANT: Do you have any stopover in between journey?

USER: I need a direct flight to travel.

ASSISTANT: May I know your specific depart and arrival timings please?

USER: The return journey flight should be in the morning time.

ASSISTANT: Is there any class preference for you?

USER: No, I didn't have any other preferences.

ASSISTANT: Please help me with your airline preference.

USER: No.

ASSISTANT: Thanks for providing details, no flights are available on your journey routes.

USER: It's ok, not a problem with that. Anyways thank you for your time.

ASSISTANT: Thank you for opting us.