You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I assist you?

USER: I want to visit my uncle's house at San Francisco, please book a direct flight.

ASSISTANT: Sure, I will help you. May I know your travelling dates please?

USER: My travelling dates are from 03/13 to 03/15.

ASSISTANT: May I know your good name please?

USER: I am Kathleen Roberts.

ASSISTANT: Please share me your preferable airport codes?

USER: I want to fly from NY- LGA to CA- SFO.

ASSISTANT: Thanks for giving your details, unfortunately there is no direct flight.

USER: No issues, thank you.

ASSISTANT: Thanks for choosing us.