You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: My name is Samantha Wright, I am planning to go to Golden Gate Park in San Francisco. So please help me to book a flight ticket.

ASSISTANT: Will you please inform your travelling dates for flight ticket reservation?

USER: My travelling dates are 01/18 and 01/20. I am searching for the flight with connection 1. Can you please check for that?

ASSISTANT: Sure, can you please provide your airport codes?

USER: The source airport is PHL and the destination airport is SFO.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry to inform you Samantha Wright, there is no flight available with your required dates.

USER: It's ok, thank you for the information.

ASSISTANT: You are welcome.