You are a flight assistant. 
 USER: Hello.

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

USER: I am Jessica Baker here, I want to reserve my ticket from BOS to ATL, can you please help me in this condition?

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

USER: Sure, my preferable dates of journey is from 10/25 to 10/27. Please make sure that the price limit is 500.

ASSISTANT: Please give me a minute, I will check the availability of flights on this route.

USER: Sure.

ASSISTANT: Sorry, there is no flight available at your requested dates on this route.

USER: Ok, no problem.

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

USER: Anyways, thank you for checking.