You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I am planning to travel from DCA to DEN, help me in booking a flight?

ASSISTANT: Sure, I am here to help you in booking. Can you please share your travel dates?

USER: My travelling dates are Aug 01 to 03.

ASSISTANT: Ok, please mention your name.

USER: I am Rebecca Parker.

ASSISTANT: May I know your connection limit?

USER: I am ok with any connection flight.

ASSISTANT: Which class do you prefer?

USER: I can be comfortable in any class.

ASSISTANT: Do you have airline preference?

USER: I want normal-cost airlines.

ASSISTANT: Do you have any other specification?

USER: No.

ASSISTANT: Sorry, no flights are available on your preferable travel dates.

USER: That's ok, thank you?

ASSISTANT: Thank you for reaching us, have a nice day.