You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please help me to book a ticket from PHL to IAD?

ASSISTANT: Sure, may I know your good name please?

USER: Kathleen wright here.

ASSISTANT: May I know on which dates you are willing to travel?

USER: I am willing to travel on May 10 and return on May 12.

ASSISTANT: Is there any specific class preference for you?

USER: Yes, I would prefer a economy class.

ASSISTANT: May I know your airline preference please?

USER: I do not have any airline preferences.

ASSISTANT: May I know your preferable time for journey?

USER: I am comfortable to travel at any time.

ASSISTANT: May I know your connection limit please?

USER: I would like to fly in a direct flight.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Sorry to inform you that, there is no flight found as per your direct flight.

USER: Ok, not an issue. Thank you.

ASSISTANT: You are welcome.Thank you for reaching us.