You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what sort of help are you seeking from me?

USER: Anthony Parker here. I'm planning to visit Georgia aquarium at Atlanta, can you please book a ticket from SFO to ATL?

ASSISTANT: Sure, Can you please let me know your travelling dates?

USER: Sure, my planned departure and return travel dates are 7th and 9th of August.

ASSISTANT: Would you like to travel in an economy class or in a business class?

USER: I'm flexible to travel in any of the classes.

ASSISTANT: Ok, please wait for a moment.

USER: Sure, I'll wait for your response.

ASSISTANT: Sorry to inform you that there are no flights available on your preferable dates.

USER: Oh! That's ok, I'll reach my destination by some other mode of transport. Thank you anyways.

ASSISTANT: Thanks for contacting with us, wish you a happy day.