You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you help me to book a flight ticket from SEA to ATL?

ASSISTANT: Let me know your travelling dates.

USER: Sure, I want to travel on June 22 and need to return on June 24.

ASSISTANT: Do you have any preference?

USER: Yes, I need a direct flight with normal-cost airline.

ASSISTANT: Let me know your name.

USER: My name is John Miller.

ASSISTANT: Sorry, no flights found for your travelling dates.

USER: Ok, not an issue.

ASSISTANT: Thank you.

USER: Thank you for the information.