You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Thomas Edwards here.

ASSISTANT: How can I assist you?

USER: Can you please book me a ticket from 11/24 and 11/26.

ASSISTANT: Can I know your airport codes?

USER: Sure, here are my travelling airport codes SEA and JFK. Please check with direct flight.

ASSISTANT: Thomas, there is no flight available on your request.

USER: No issues, thank you for your help.

ASSISTANT: Thank you for reaching us.