You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am planning to visit Museum of Art at Philadelphia, could you please help me with booking a flight ticket from DFW to PHL?

ASSISTANT: Sure, please share your journey dates?

USER: I would like to depart on July 10th and return on July 12th.

ASSISTANT: Do you have any specifications?

USER: I am looking for a direct flight.

ASSISTANT: May I know your good name?

USER: I am Samantha Williams.

ASSISTANT: Is there any class preference?

USER: I am comfortable with any class.

ASSISTANT: Sorry, no flights found on your given details.

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you for choosing us.