You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: I would like to visit Los Angeles to do a research work, please help me in booking a ticket from SEA to LAX.

ASSISTANT: I am happy to help you with that.

USER: Thank you.

ASSISTANT: Can you please share your preferable journey dates?

USER: My journey dates are 04/19 and 04/21.

ASSISTANT: I am sorry to say that there is no flight found.

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

ASSISTANT: May I know your name please?

USER: My name is Emma Harris.

ASSISTANT: Thank you for contacting us.