You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I help you?

USER: I want to book a ticket from MSP to EWR, can you help me?

ASSISTANT: Sure, May I know your travelling dates?

USER: My travel dates are Oct 21 and 23.

ASSISTANT: Do you have any connection limit?

USER: I prefer a connecting flight.

ASSISTANT: Any other preferences?

USER: I prefer to travel in normal cost airline.

ASSISTANT: May I know your name?

USER: I am David Wilson.

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

USER: No problem, thanks for checking.

ASSISTANT: Thank you.