You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Please make a reservation with the name of David Mitchell from Washington.

ASSISTANT: Sure, I am happy to help you. Please provide your travelling dates.

USER: My travelling dates are Apr 29 and May 01.

ASSISTANT: Kindly mention your respective airport codes.

USER: My source is IAD and destination is LGA.

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

USER: I need a lay by in between my journey.

ASSISTANT: Is there any other specifications for you?

USER: I want to return in the morning.

ASSISTANT: Sorry, no flights are available on your journey routes.

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for opting us.