You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I aid you?

USER: Can you please help me to book flight ticket from PHl to MSP?

ASSISTANT: Sure, May I know your travelling dates?

USER: My trip dates are Sept 16 and Sept 18.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Any other preferences?

USER: I prefer to travel in economy class and which returns in the evening.

ASSISTANT: May I know your name?

USER: I am Anna Wright.

ASSISTANT: Sorry, there are no flights found with your details.

USER: It's ok, thank you.

ASSISTANT: Thank you.