You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Brian Gonzalez, want to travel from SFO to LGA. Please help me in booking my ticket.

ASSISTANT: Sure, please provide your trip dates.

USER: Sure, my trip dates are from 06/11 to 06/13.

ASSISTANT: Do you have any other requirements?

USER: Make sure, my departing time should be in evening with 1 connecting flight.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Sorry Brian, there is no flights available in the evening.

USER: It's ok, thank you for your help.

ASSISTANT: Most welcome.