You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am looking for a flight from DEN to IAH, can you please help me in booking?

ASSISTANT: Sure, I'm glad to help you with that. May I know the dates on which you prefer to depart and return?

USER: My travelling dates are Apr 02 and Apr 04.

ASSISTANT: Do you need stopover in between your journey?

USER: No.

ASSISTANT: Please let me know if you have any other specifications.

USER: I don't have any specifications.

ASSISTANT: May I know your good name please?

USER: My name is Jerry Phillips.

ASSISTANT: Sorry to inform you that there are no flights available for you on those dates with your given details.

USER: That's ok, thank you for checking.

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