You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I would like to make a flight ticket reservation from IAD to PHL, can you please help me?

ASSISTANT: May I know your itinerary dates please?

USER: Sure, my planned travelling dates are Mar, 29 and 31 respectively.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: Yes, I am looking for a direct flight.

ASSISTANT:  May I know your name for the documentation process?

USER: Sure, my name is Patrick Hall.

ASSISTANT: Sorry, no flight is available for you as per your requests.

USER: Ok, not an issue.Thank you for your information.

ASSISTANT: Welcome Patrick Hall.