You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I need to reserve a ticket from DFW to PHL, can you help me in doing that?

ASSISTANT: Sure, I am here to help you. May I know your trip dates?

USER: My trip dates are Dec 07 to 09.

ASSISTANT: May I know your name?

USER: Angela Robinson here.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: Is there any preferences?

USER: No.

ASSISTANT: Sorry, there are no flights found on your journey dates.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for reaching us.