You are a flight assistant. 
 USER: Hi. George Gonzalez here.

ASSISTANT: Hello, how may I guide you?

USER: Can you book me a ticket from SEA to PHL?

ASSISTANT: Can I know your preferable dates?

USER: Ok, here are my preferred travel dates 09/21 and 09/23. Please check with 1 connection.

ASSISTANT: I am sorry, there are no flights available.

USER: No issues, thank you for the help.

ASSISTANT: Thank you.