You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I would like to travel from LGA to SFO, please help me to book my flight ticket.

ASSISTANT: Sure, let me know your trip dates please?

USER: Thank you. I have to depart on Apr 24th and return back on Apr 26th.

ASSISTANT: May I know your connection limit?

USER: I am looking for a connecting flight.

ASSISTANT: Do you need any other preference?

USER: Actually, it's an emergency. Please check for the direct flight and let me know.

ASSISTANT: Sure, can I know your name please?

USER: My name is Jerry Wright.

ASSISTANT: Sorry to inform you that there are no flight services available on your given details.

USER: Sad to hear that. Anyway, thank you for checking.

ASSISTANT: Thank you for contacting us.