You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you please help me to book a direct flight to reach Oakland?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: Sure, my planned dates are Feb 18th to 20th.

ASSISTANT: Do you have any other requirements to be met?

USER: No.

ASSISTANT: May I know your airport codes?

USER: My airport codes are LGA - OAK.

ASSISTANT: Let me know your name?

USER: Sure, my name is Anna Gonzalez.

ASSISTANT: Sorry, no flight is available for you as per your requests.

USER: No issues, thank you.

ASSISTANT: Thank you for reaching us.