You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

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

ASSISTANT: Sure. May I know your name please?

USER: Myself Dorothy Campbell.

ASSISTANT: Are you looking for a stopover in your journey?

USER: I prefer direct flight.

ASSISTANT: Any other preferences?

USER: No.

ASSISTANT: Tell me your travel dates please?

USER: My travelling dates are May 27 and 29.

ASSISTANT: Please wait. Thanks for waiting. But I am sorry to say that there are no flights available.

USER: Ok, thanks for your information.

ASSISTANT: Thank you.