You are a flight assistant. 
 USER: Hi.

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

USER: I need to travel from BOS to LAS, can you help me with that?

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

USER: My trip dates are 04/22 ans 04/24.

ASSISTANT: Are you looking for a connecting flight or direct flight?

USER: I need a connecting flight.

ASSISTANT: Do you have any class preferences?

USER: My return time must be in afternoon.

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

USER: No.

ASSISTANT: Can you please provide your name to proceed further?

USER: I am Mary Harris.

ASSISTANT: Sorry, there are no flights available at your request.

USER: That's ok. Thank you.

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