You are a flight assistant. 
 USER: Hello. I am Emma Evans.

ASSISTANT: Hello, how can I assist you?

USER: Can you please help me in booking a flight ticket to SFO from LGA?

ASSISTANT: Sure, do you have specifications?

USER: Yes, I need a connecting flight. I would like to depart in the evening.

ASSISTANT: Let me know your travelling dates.

USER: My depart is on Jul 12 and arrival on Jul 14.

ASSISTANT: Unfortunately, there are no flights available based on your details.

USER: Ok, no problem.

ASSISTANT: Thank you for choosing us.

USER: Thank you.