You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: My name is Brenda Thomas, I want to book a flight from SFO to visit my uncle's home. Can you book a flight to PHL?

ASSISTANT: Sure, we are mirthful to help you. Do you need any flag stop in between your journey?

USER: Yes, I need a flag stop.

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

USER: I will travel on Apr 27 and return on Apr 29.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for your time, no flights were found based on your schedule.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for choosing us.