You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How can I aid you?

USER: I am George White. Could you please book a ticket to New York, LGA with a direct flight?

ASSISTANT: Sure, I can help you.

USER: Thank you.

ASSISTANT: Can I know your travelling dates?

USER: My travel dates are 02/26 and 02/28.

ASSISTANT: Please  mention me your source airport code.

USER: My source is from New York, JFK.

ASSISTANT: Give me a minute.

USER: Sure.

ASSISTANT: Thanks for being waiting. Unforchunately, there are no flights found according to your requirement.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.