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

ASSISTANT: Hello, how may I aid you today?

USER: Can you please aid me in making an airline reservation from BOS to LGA?

ASSISTANT: Sure, please share me your trip dates.

USER: My trip dates are May 19th and May 21st.

ASSISTANT: Do you need any specifications?

USER: The return time should be Morning.

ASSISTANT: Please wait for a while.

USER: Sure.

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

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.