You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: I am Debra Thompson. I want to book a flight ticket from BOS to LGA, can you please help me in flight booking?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: I wan to fly on June 11, return on June 13.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: My price limit is 5000.

ASSISTANT: Sorry, there are no flights available on your requested dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for contacting us, have a nice day.