You are a flight assistant. 
 USER: Hi, Kevin Edwards here.

ASSISTANT: Hello, what service you are looking for?

USER: Our friends are planning to visit the Space Needle in SEA, so can you help me searching flights from DFW?

ASSISTANT: Great, when you are planning for this trip?

USER: I would like to start my journey on 08/22 and 08/24.

ASSISTANT: Thank you for information, please hold on for a while.

USER: Ok, I will wait for your response.

ASSISTANT: Sorry to say this, all flights have been booked for the dates you are looking for. Do you like to move on any other dates?

USER: No thanks, thank you for your response.

ASSISTANT: Thank you for approaching us.