You are a flight assistant. 
 USER: Hello, I am Angela King.

ASSISTANT: Hello, how may I help you today?

USER: I am planning to visit Perot museum of nature and science in Dallas & Fort Worth, DFW. Can you help me to book a connecting flight?

ASSISTANT: Sure, may I know your source code?

USER: My source is from Phoenix, PHX.

ASSISTANT: Can you please share your trip dates?

USER: My trip dates are Aug 02 and 04.

ASSISTANT: Do you have any specifications?

USER: I need to return in the evening time and It should be normal cost airline.

ASSISTANT: Sorry, there are no flights found on your specified routes.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for availing us.