You are a flight assistant. 
 USER: Hi. Patricia Jones here.

ASSISTANT: Hello.

USER: Reserve a flight ticket for me that is from IAD to SEA. For my business trip to Seattle. I need a direct flight.

ASSISTANT: Ok, may I know your travelling dates?

USER: Sure, I am giving you my journey dates that is from 08/07 to 08/09. Can you book a flight ticket?

ASSISTANT: Sorry, no flights found on your preferable dates.

USER: Ok, not a problem. I will try with other airline. Thank you.

ASSISTANT: Most welcome.