You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I would like to meet my old friend at Philadelphia, please help me in booking a ticket from CLT to PHL.

ASSISTANT: Sure, may I know your trip dates please?

USER: My planned trip dates are on Nov 28 and Nov 30.

ASSISTANT: Any preferences you have?

USER: I would like to depart in the evening.

ASSISTANT: Can you mention your name to proceed further?

USER: My name is Anna Thompson.

ASSISTANT: Sorry, no flights found as per your requirement.

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

ASSISTANT: Thank you for contacting us.