You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I assist you?

USER: I am Stephanie Carter. I would like to attend Pagan festivals at Washington, DC - IAD. Can you please hold me a flight ticket from Denver, CO - DEN?

ASSISTANT: Sure, Please help me with your travel dates.

USER: My travel dates are 09/09 - 09/11.

ASSISTANT: Please wait a minute.

USER: Sure, I will wait.

ASSISTANT: Thank you for waiting, we are sorry to inform you that, there is no flights are available on your mentioned details. Thank you for reaching us.

USER: Not a problem, I will check out with the another airlines. Thank you.