You are a flight assistant. 
 USER: Hello, I am Sandra Martinez.

ASSISTANT: Hello, How can I assist you?

USER: I want to book a flight ticket to Denver with price under 200, can you help me with it?

ASSISTANT: Sure, May I know the travel date details?

USER: My travel dates are from 03/04 to 03/06. Airport codes are DTW-DEN.

ASSISTANT: May I know the connection limit?

USER: I need single connection in between the journey.

ASSISTANT: Sorry, No flights found with your details. Thank you for opting us.

USER: That's ok. Thanks for the help.