You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you for the day?

USER: Amy Clark here. I'm planning to visit San Francisco, can you please book a ticket from CLT to SFO?

ASSISTANT: Sure, may I know your connection limit?

USER: Yes, my connection limit is 1.

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: My planned departure and return travel dates are 30th August and 1st September.

ASSISTANT: Do you have any other specifications?

USER: Yes, I need economy class ticket and I want to depart on the evening.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, no flights are available as per your requirements.

USER: Oh! That's ok, thank you for giving the information.

ASSISTANT: Thank you for choosing us.