You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you at this moment?

USER: Can you please book a ticket from LGA to ATL to attend Science festival?

ASSISTANT: Sure, please let me know your journey dates?

USER: My journey dates are Apr 22 and Apr 24.

ASSISTANT: Can you please forward your name?

USER: I am Sandra Williams.

ASSISTANT: Do you have any connection limit?

USER: I want single connected flight.

ASSISTANT: Are there any more specifications?

USER: No.

ASSISTANT: Sorry, there are no flights are available matching your details.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for choosing us.