You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, may I know your departure and arrival dates?

USER: My departure and arrival dates are 06/29 and 07/01.

ASSISTANT: May I know your name?

USER: Myself Michael Robinson.

ASSISTANT: Do you need a single connecting flight?

USER: I need a single connecting flight.

ASSISTANT: May I know your other preferences?

USER: I would like to prefer normal cost airline.

ASSISTANT: Sorry, currently there are no flights available on your request.

USER: It's ok, thank you for your help.

ASSISTANT: Thank you for reaching us.