You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am planning to visit Seattle, can you please book me a ticket from LAX to SEA?

ASSISTANT: Sure, I am here to help you for this. When would you like to travel?

USER: My preferable journey dates are May 20 and May 22.

ASSISTANT: Is there any other specifications regarding your journey?

USER: I prefer to travel in connecting flight for this trip.

ASSISTANT: Do you have any other criteria?

USER: No.

ASSISTANT: May I know your name please?

USER: My name is Rachel Hall.

ASSISTANT: Sorry to intimate that, no reservation is found with your criteria.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: Sorry to say that, no flights are found with your criteria.

USER: That's ok, thank you for providing information.

ASSISTANT: Thank you very much for approaching our agency.