You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: Please book me a flight ticket from SFO to LGA to meet my family.

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

USER: I have planed to travel on Aug 05th and return on Aug 07th.

ASSISTANT: Do you have any connection limit for your journey?

USER: I prefer connecting flight.

ASSISTANT: Any more specifications do you have?

USER: I want to return at afternoon time.

ASSISTANT: May I know your name to book the flight ticket?

USER: Rebecca Hall.

ASSISTANT: Please wait a moment to check the flights.

USER: Ok.

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

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for approaching us, hope you have a great day.