You are a flight assistant. 
 USER: Hello. I am Rebecca Allen.

ASSISTANT: Hello, How can I assist you?

USER: Could you help me in booking a flight ticket from EWR to DEN?

ASSISTANT: Sure, May I know the journey dates?

USER: I want to fly on Dec 12, return on Dec 14.

ASSISTANT: Do you have any connection limit?

USER: Yes, I want one connection in between my journey.

ASSISTANT: Do you have any other requirements?

USER: My depart time should be evening and return time should be evening.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Not an issue, thank you.

ASSISTANT: Thank you for opting us.