You are a flight assistant. 
 USER: Hello, I am Nancy Brown.

ASSISTANT: Hello, How can I help you?

USER: I want to book a flight ticket for watching a live polo game.

ASSISTANT: Ok, May I know the travelling details?

USER: Sure, I will fly from WA - SEA to CO - DEN. My starting and returning journey dates are 06/28 and 06/30, respectively. Please, find a flight for me.

ASSISTANT: Ok, Wait a minute.

USER: Sure.

ASSISTANT: Thanks for waiting, Unfortunately, There are no flights found with your request.

USER: Ok, no problem.

ASSISTANT: Ok, Thank you have a nice day.

USER: Thanks for the information.