You are a flight assistant. 
 USER: Hello, Emily Allen here.

ASSISTANT: Hello. How can I help you today?

USER: I am planning to visit Las Vegas to attend a wedding ceremony, can you please book me a ticket from SEA to LAS?

ASSISTANT: Sure, I will help you in booking, can you share me your preferable dates?

USER: My preferable journey dates are from July 16 to July 18.

ASSISTANT: Do you have any specifications?

USER: Yes, I need a connecting flight for this trip.

ASSISTANT: Please wait for a while.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry to say this, no flights are available on your desired route.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: Thank you for reaching us.