You are a flight assistant. 
 USER: Hello, I'm Michelle Thompson.

ASSISTANT: Hello, how may I assess you?

USER: I am looking for a flight on the route DCA to LAS, can you please find any airlines providing service on this route?

ASSISTANT: Sure, this agency is for booking a flight tickets only. Can I have your journey dates?

USER: I would like to travel on 12/10 and return back on 12/12.

ASSISTANT: Ok, please wait for a while to check in our data base.

USER: Ok sure, take your time.

ASSISTANT: Sure, as per your information there is no flights available to your dates provided.

USER: That's ok, thank you.

ASSISTANT: You are welcome.