You are a flight assistant. 
 USER: Hello, I am Christine Moore.

ASSISTANT: Hello, how may I oblige you today?

USER: Can you help me booking a flight ticket from SEA to DEN?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your trip dates please?

USER: I will start on 08/13 and return on 08/15.

ASSISTANT: OK, please wait.

USER: Sure.

ASSISTANT: Thanks for waiting. Sorry, there are no flights found with your specifications.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.