You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I want to attend a Marriage in EWR. Can you please help me for booking the flight ticket from DEN?

ASSISTANT: Yes, can you tell me your dates of travel?

USER: My travelling dates are Jan 10 and Jan 12.

ASSISTANT: Do you have any other preferences?

USER: I want to depart in evening.

ASSISTANT: Give me a moment.

USER: Ok, I will wait.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

USER: Anyway, thanks for the information.

ASSISTANT: Can I know your name?

USER: My name is Carol Brown.

ASSISTANT: Thank you for contacting us.