You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I would like to attend my friend's wedding anniversary at Las Vegas, please help me in booking a ticket from BOS to LAS.

ASSISTANT: Sure, may I know your planned travel dates?

USER: My planned travel dates are on June 24 and June 26.

ASSISTANT: Do you have any limits on number of connections?

USER: I am looking for a connecting flight.

ASSISTANT: Do you have any another specifications on your journey?

USER: I prefer normal-cost airlines for my trip.

ASSISTANT: May I know your name for the booking process?

USER: My name is Sarah Mitchell.

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

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Welcome, thank you for reaching us.