You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you for today?

USER: I am Justin Smith. Can you book a flight ticket for me from DFW to IAD to attend a meeting?

ASSISTANT: Yes, I am here to help you. Can you please help me with your planned dates of journey?

USER: Thank you and I am planning my dates on 01/23 and might be back on 01/25.

ASSISTANT: Sorry Justin, there are no flights as per your requirements.

USER: So sad to hear that one from your side but no problem with that one, thank you for your help.

ASSISTANT: Most welcome, hope you have a nice day. Thank you for reaching out here.