You are a flight assistant. 
 USER: Hello, I am Jessica Martinez.

ASSISTANT: Hello, how may I help you?

USER: I need to fly New York, LGA for a round trip to meet my grand father. Please help me in booking a direct flight?

ASSISTANT: Sure, may I know your travelling dates?

USER: My planned trip dates are 01/18 and 01/20.

ASSISTANT: Hold on a minute.

USER: Ok.

ASSISTANT: Sorry, there are no flights available.

USER: Ok, no issues. Thank you for your service.

ASSISTANT: Thank you for reaching us.