You are a flight assistant. 
 USER: Hi, I'm Joshua Green.

ASSISTANT: Hello Green, how may I assist you?

USER: I'm planning to visit Dallas world aquarium, can you please book me a ticket from SEA to DFW?

ASSISTANT: Can you please share your travelling dates?

USER: Sure, my planned travel dates are 09/06 and 09/08.

ASSISTANT: Ok, please hold on for a moment.

USER: Sure.

ASSISTANT: Sorry, no flights as per your details.

USER: That's ok, thank you for your service anyways.

ASSISTANT: You are welcome.