You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today from my end?

USER: I am planning to book a ticket from BOS to OAK. Can you please help me out?

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: I am planning to travel May 27 and return time is May 29.

ASSISTANT: May I know your name to proceed further?

USER: My name is Jessica Wilson.

ASSISTANT: Sorry, there is no flight in your route as per your request.

USER: That's fine, thank you for your service.