You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Can you help me to book a flight from SEA to LGA?

ASSISTANT: Sure, may I know your name?

USER: My name is Kevin Lee.

ASSISTANT: Can I know your travelling dates?

USER: My travelling dates are June 27 and 29.

ASSISTANT: Do you prefer a connecting flight?

USER: I prefer direct flight.

ASSISTANT: Ok, may I know your other specifications?

USER: I want to depart at morning.

ASSISTANT: Sorry, there are no flights available on your travelling dates.

USER: No issues, thank you for your time.

ASSISTANT: Thank you for choosing us.