You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I respond to your request?

USER: Can you please help me to book flight ticket from IAH to ORD?

ASSISTANT: Sure, we are ecstatic to help you. On which dates would you like me to book a flight ticket for you?

USER: My trip dates are Apr 16 and Apr 18.

ASSISTANT: Do you prefer any lay by in between journey?

USER: Yes, I require a lay by in between my journey.

ASSISTANT: May I know your good name please?

USER: I am Paul Martinez.

ASSISTANT: Is there any another specifications on your trip, so that I can arrange like that only.

USER: I prefer to return in the morning.

ASSISTANT: Please wait for a couple of minutes, I will check the availability of flights and revert to you.

USER: Ok.

ASSISTANT: Thanks for waiting, there are no flights available at this moment matching your particulars.

USER: Not a problem, thank you.

ASSISTANT: Thanks for approaching us.