You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

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

ASSISTANT: Sure, Please provide me your itinerary travel dates.

USER: My trip dates are Apr 13 and Apr 15 respectively.

ASSISTANT: May I know your name please?

USER: I am Rebecca Parker here.

ASSISTANT: May I know about your connection limit?

USER: I prefer for single connecting flight.

ASSISTANT: Are there any more preferences that you want to avail?

USER: No other preferences.

ASSISTANT: Rebecca Parker. I regret to inform that there are no flights on your route with the given dates.

USER: Thank you for the help.

ASSISTANT: Thank you for reaching us.