You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I am Ronald Rodriguez. I want to book a ticket from LGA to AUS, can you help me?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My travel dates are 10/27 and 10/29.

ASSISTANT: Is there any class preference for you?

USER: I want to travel in economy class.

ASSISTANT: Do you have any specifications?

USER: I want to return in the evening.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for reaching us.