You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER:  My name is Thomas Hill. I would like to book a ticket from BOS to LGA, to attend a conference.

ASSISTANT: Ok, I can help you with that. May I know your planned travel dates please?

USER: My itinerary dates are Mar 11 and Mar 14.

ASSISTANT: May I know in which class you prefer to travel?

USER: I am flexible with any class.

ASSISTANT: Can you please recheck your travel dates?

USER: Sorry my bad, it's Mar 11 and Mar 13.

ASSISTANT: Ok, please let me know if you have any other specifications.

USER: Yes,  I would like to board on single connection flight where, depart time should be in the afternoon and return time should be in the evening.

ASSISTANT: May I know your connection limit please? Ok, please wait for a while.

USER: Sure, take your time.

ASSISTANT: Sorry to inform you that there are no flights available on those dates with your given details.

USER: No problem, thank you very much.

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