You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: Christopher Parker here. I would like to travel from DTW to IAD to meet my friend, can you make a reservation for me?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: My travel dates are 11/12 and 11/14.

ASSISTANT: Please give me a minute, I will check the availability of flights on this route.

USER: Sure.

ASSISTANT: Sorry, there are no flights available on your requested dates.

USER: That's fine, thanks for your help and information.

ASSISTANT: Thank you for contacting us, have a nice day.