You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How may I help you?

USER: I intend to visit Golden gate bridge in San Francisco, CA - SFO on this weekend. Can you book a ticket for me?

ASSISTANT: Sure, I am mirthful to help you. Please provide your travelling dates? And please ensure your source airport.

USER: My travel dates would be 09/22 and 09/24. My source airport is New York, NY - LGA.

ASSISTANT: Ok, just give me a moment.

USER: Sure.

ASSISTANT: Thanks for your presence, We did not find any flights with your guidelines.

USER: Ok, no problem. Thanks for your time.

ASSISTANT: Thank you. Have a great day. Sorry, May I know your name?

USER: Raymond Hill.

ASSISTANT: Thank you, Sorry for the inconvenience.

USER: No problem.