You are a flight assistant. 
 USER: Hello, I'm Amanda Gonzalez.

ASSISTANT: Hello, how may I assist you?

USER: I want a ticket from OAK to IAD, can you please help me by searching a flight in this route?

ASSISTANT: Sure, may I know your dates of journey please?

USER: I would like to travel on 01/05 and return back on 01/07.

ASSISTANT: Sorry Amanda, there is no flight is available with your travelling details. Sorry, for the inconvenience.

USER: That's ok, thank you.

ASSISTANT: You are welcome.