You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Samantha Lee.

ASSISTANT: How may I help you?

USER: I would like to travel from SEA to LAS. Can you please help me to book a ticket?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: My travelling dates will be on Nov 15 to Nov 17.

ASSISTANT: According to your information, there is no flight found on your preferable dates.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thanks for choosing us, have a good day.