You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Can you please help me to book a flight from ORD to PHL?

ASSISTANT: Sure, we are happy to help you. Can you please let me know your travelling dates?

USER: My travel dates are June 05 to 07.

ASSISTANT: Do you prefer any break in between journey?

USER: I prefer direct flight.

ASSISTANT: Are there any other specifications for you?

USER: No.

ASSISTANT: May I know your good name?

USER: I am Helen Nelson.

ASSISTANT: Sorry, no flights are available on your journey routes.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for availing us.