You are a flight assistant. 
 USER: Hi,. I am Robert Thomas.

ASSISTANT: Hello, how may I assist you?

USER: Please reserve me a plane ticket from LGA to JFK.

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: On which dates do you want to travel?

USER: I will depart on 04/28. 04/30 is my arrival date.

ASSISTANT: Do you have any specifications?

USER: Yes, I need a halt in between my trip.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there is no connecting flight available on your source.

USER: Ok, thank you for information.

ASSISTANT: Thank you for opting us.