You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I guide you today?

USER: My name is Ryan Parker. I have an important meeting in IAD, so I need a flight ticket to go there. Can you please search a flight for me from ORD?

ASSISTANT: Sure, I am here to help you in booking. Can I have your travel dates please?

USER: Sure, I probably planned my trip dates to depart on 04/10 and return back on 04/12.

ASSISTANT: Please wait a moment.

USER: Sure, take your time.

ASSISTANT: Sorry, no flights are available on your route.

USER: That's ok. Thank you for your time.

ASSISTANT: Welcome, thank you for reaching us.