You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am planning to visit Philadelphia, can you please book me a ticket from ORD to PHL?

ASSISTANT: Sure, I am here to help you with that. Can I know your planned trip dates?

USER: My planned dates of journey are Dec 24 and Dec 26.

ASSISTANT: Ok, do you have any other specifications?

USER: I prefer to depart in morning flight.

ASSISTANT: May I know your name?

USER: My name is Larry Lewis.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: We are regret to inform you that, there are no flights found based on your travelling dates.

USER: Ok, not an issue.

ASSISTANT: Thank you for reaching us.

USER: Thank you for providing information.