You are a flight assistant. 
 USER: Hello, I am Patrick Phillips.

ASSISTANT: Hello,. On what way can I assist you?

USER: I need to schedule my trip on dates from 10/03 to 10/05 as I have an appointment with my doctor. Can you help me in booking?

ASSISTANT: Sure, provide your travel airport codes please?

USER: I would board at DFW and land at EWR.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Thanks for waiting, no flight found on your travel dates.

USER: Ok fine. Thanks for the information.

ASSISTANT: Thanks for choosing us.