You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am planning to visit San Francisco, can you please book me a ticket from ATL to SFO?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Can you share me your travelling dates to book a flight ticket?

USER: My preferable journey dates are July 13 and July 15.

ASSISTANT: Do you have any other specifications?

USER: I prefer business class flight.

ASSISTANT: Let me know your name?

USER: My name is Pamela Miller.

ASSISTANT: Ok, wait for some time I will check and get back to you.

USER: Sure, I will wait for your information.

ASSISTANT: Thanks for waiting there are no flights found on your details.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: Thanks for approaching us.