You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you now?

USER: Can you help me in booking a flight ticket to BOS from LAX in July month?

ASSISTANT: Sure, I am glad to help you with that. Can you please provide your preferable dates of travelling?

USER: Thanks for considering my request. My preferable dates of travelling are July 10 and July 12.

ASSISTANT: On whose name I have to book the flight ticket?

USER: Do book the ticket with my name William Clark.

ASSISTANT: Do you have any connection limit?

USER: I need single connecting flight for my journey.

ASSISTANT: Any other preferences do you have?

USER: Yes, I prefer to have a normal-cost airline.

ASSISTANT: Wait a moment to check the flights.

USER: Sure.

ASSISTANT: We regret to inform you that, there are no flights available for your journey with your requested dates of travelling.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Thank you for reaching to our services, hope you have a great day.