You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: My name is Ryan Thomas.

ASSISTANT: How can I help you?

USER: I have a concert to attend at Seattle. Can you help me in booking a ticket from DEN to SEA?

ASSISTANT: Sure, may I know your travel dates please?

USER: My planned journey dates are 12/10 and 12/12.

ASSISTANT: Please be on hold.

USER: Sure.

ASSISTANT: Ryan, there are no flights available for you on those dates.

USER: Its ok, thank you for the information.

ASSISTANT: Thank you for choosing us.