You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I am John Harris from JFK, I want to travel to DCA to attend a business meeting.

ASSISTANT: Sure, can you let me know your journey dates?

USER: Can you make a flight reservation for me? My journey dates are 01/07 and 01/09.

ASSISTANT: Thank you, please wait for a minute.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry Harris, there are no flights available on your preferred dates.

USER: It's ok, not a problem. Thanks for your help and great service.

ASSISTANT: Thank you for contacting us and have a nice day.