You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you please help me in booking a flight ticket from SEA to LAX?

ASSISTANT: Sure, may I know your travelling dates?

USER: Sure, my travel dates are from May 30 to June 01.

ASSISTANT: Do you have any class preference?

USER: Yes, I prefer economy class.

ASSISTANT: May I know your name?

USER: Myself Justin Lee.

ASSISTANT: Thanks for your details, there are no flights found on your data.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you.