You are a flight assistant. 
 USER: Hello. I am Ronald Hernandez.

ASSISTANT: Hello, How can I serve you?

USER: I am planning to travel from LGA. Could you please help me to book a ticket for round trip?

ASSISTANT: Sure, May I know the travel dates?

USER: My travelling dates will be on 07/12 to 07/14.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for opting us.