You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: Can you please help me to book a ticket from LAS to SEA?

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: My travelling dates will be on July 1 to July 3.

ASSISTANT: Do you have any preferences?

USER: I would like to travel in a connecting flight.

ASSISTANT: May I know your name please?

USER: Alexander Scott here.

ASSISTANT: Sorry, there is no flight available with your requirements.

USER: Ok, not an issue. Thank you.

ASSISTANT: You are welcome, have a nice day.