You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Kathleen Smith here.

ASSISTANT: How may I guide you today?

USER: I would like to book a ticket from AUS to LGA, can you help me with that? The travel dates are from 08/31 to 09/02.

ASSISTANT: Sure, I am glad to help you with that. Do you have any connection limit?

USER: I need a flight with 1 connection limit.

ASSISTANT: Do you have any class preference?

USER: But, I would like to depart during afternoon time.

ASSISTANT: Please hold on a moment to check the flights on your route.

USER: Ok.

ASSISTANT: We regret to inform you that, there are no flights running on your route with your required specifications.

USER: That's ok, thank you for your help.

ASSISTANT: Thank you for reaching us, have a great day.