You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jack Smith.

ASSISTANT: How can I assist you?

USER: Do you have any flight from LAX to SEA to attend a business success party with my family members?

ASSISTANT: Sure, may I know your preferable journey dates please?

USER: My preferable dates are 01/05 and 01/07.

ASSISTANT: Wait for a while please.

USER: Sure.

ASSISTANT: Jack Smith, there are no flights available in your route.

USER: That's fine, not a issue. Anyways, thanks for your valuable information.

ASSISTANT: Thank you for approaching us.