You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I am Jonathan Mitchell, can you help me to book a morning flight from ORD?

ASSISTANT: Ok, please may I know the dates of your journey?

USER: My travelling dates are May 31 and June 02.

ASSISTANT: Please mention the departure time if planned and the destination airport code.

USER: My preferred destination airport code is EWR.

ASSISTANT: Sorry, there are no flights available at your source location.

USER: No issues, thank you for your time.

ASSISTANT: Thank you for choosing our agency.