You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am looking for a flight from BOS to LAS, can you please help me in booking?

ASSISTANT: Sure, I am here to help you for this. When are you planning your trip?

USER: My travelling dates are Aug 14 and Aug 16.

ASSISTANT: May I know your name please?

USER: My name is Melissa Moore.

ASSISTANT: Is there any connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any other specifications regarding your journey?

USER: I want to return in evening.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry for inconvenience, no flights are found with your specifications.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you very much for contacting our agency.