You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am planning to visit the Golden Gate Park in San Francisco, can you please book a ticket?

ASSISTANT: Sure, I will help you out in booking ticket. Can you please provide me your travelling dates?

USER: Sure, my departure and arrival dates are 12/11 and 12/13.

ASSISTANT: Can you please provide me airport codes?

USER: Ok, my airport codes are NV - LAS and CA - SFO.

ASSISTANT: Ok, please wait a moment I will check for availability of flights.

USER: Ok.

ASSISTANT: There is flight available with flight number 1002 with zero connections. Can I proceed to book the ticket?

USER: Please could you check it with 1 connection?

ASSISTANT: Ok, please wait a moment.

USER: Ok, sure.

ASSISTANT: Sorry, there is no flights available with one connection on your dates.

USER: No issues, thank you for your help.

ASSISTANT: Thank you for choosing our services.