You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: Stephanie Carter here. I want to reserve a flight ticket on the route from Charlotte CLT to meet my aunt at IAD. Can you help me?

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

USER: My trip will start on 09/09, and I want to return on 09/11.

ASSISTANT: Sorry, No flights found with your preferable dates. Thank you for reaching us.

USER: Oh! That's sad to hear from you, thank you for checking anyways. Most welcome.