You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Can you please help me in booking my flight ticket from MSP to DEN?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: Sure, my travelling dates are from 06/20 to 06/22.

ASSISTANT: Do you have any preferences about flight connections?

USER: I need a single connecting flight.

ASSISTANT: Do you have any preferences about class?

USER: No.

ASSISTANT: Please mention your name.

USER: Myself Sarah White.

ASSISTANT: There is no flights found under your preferable details.

USER: It's ok, thank you.

ASSISTANT: Welcome, have a great day.