You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I want to book a flight in afternoon from San Francisco. Can you find me a flight?

ASSISTANT: May I know your travel dates?

USER: I will fly on Apr 03 and return on Apr 05.

ASSISTANT: Do you have any connecting limit preferences?

USER: I prefer a connecting flight.

ASSISTANT: May I know your nearest airport codes?

USER: My source point is SFO and my destination is LGA.

ASSISTANT: Please share your name to proceed for booking?

USER: My name is Timothy Adams.

ASSISTANT: Sorry there is no flight found as per your preferences at the moment.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for choosing us.