You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you today?

USER: Can you please book a flight ticket from SFO to LGA?

ASSISTANT: Sure, please share me your trip dates.

USER: My trip dates are 04/27 and 04/29.

ASSISTANT:  Can I know your good name please?

USER: James Hernandez here.

ASSISTANT:  Do you have any connection limit?

USER: I am comfortable to travel with a single connecting flight.

ASSISTANT: Are there any other specifications?

USER: I want to depart in afternoon.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for opting us.