You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Dennis Anderson here.

ASSISTANT: How can I help you today?

USER: I would like to visit LAX to see the Griffith Park, can you help me to make a reservation from ORD?

ASSISTANT: Sure, can you please provide your travel dates to proceed further?

USER: My travel dates are 09/11 and 09/13.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: Dennis Anderson, there are no flights available on this route on your provided dates due to heavy bookings.

USER: That's fine, thanks for your valuable information.

ASSISTANT: Thank you for contacting us.