You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you today?

USER: Can you help me to book a flight ticket from PHL to LGA?

ASSISTANT: Sure, we are happy to assist you in booking. Could you please share your planned travelling dates to proceed further?

USER: My travel dates are May 08 and May 10.

ASSISTANT: May I know your name please?

USER: I am Daniel Harris.

ASSISTANT: Would you like to travel in a connecting flight or a direct flight?

USER: I prefer connecting flight for this trip.

ASSISTANT: Is there any other preferences that you would like to add before booking?

USER: No, thanks for asking.

ASSISTANT: Let me check the availability of flights and revert to you.

USER: Ok.

ASSISTANT:  We are unable to provide flight in between your journey routes due to some technical up-gradation at destination airport.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for approaching us.