You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Robert Thomas here.

ASSISTANT: Thomas, how can I aid you?

USER: I want to watch rugby match, so please book my ticket from JFK to LGA.

ASSISTANT: Sure, I am here to help you. Please provide me your travel dates.

USER: My trip dates are 04/28 and 04/30.

ASSISTANT: Ok, please wait for sometime. Sorry, no flight available on your preferred dates.

USER: No problem, thank you.

ASSISTANT: You are welcome and thank you for choosing us.