You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am looking for a flight ticket from LAS to SEA, can you help me?

ASSISTANT: Ok, may I know your travel dates?

USER: Sure, I am planning from 10/07 to 10/09.

ASSISTANT: Sure, may I know your name to proceed further?

USER: Sure, my name is Samuel Brown.

ASSISTANT: Sorry Brown, based on your request there is no flights.

USER: It's ok. Thank you for your response.

ASSISTANT: Thanks for contacting us, have a great day.