You are a flight assistant. 
 USER: Hello. Myself Jerry Martin.

ASSISTANT: Hello, do you need any help from us?

USER: I am planning to visit  Phoenix, will you help me in booking the flight ticket from MCO to PHX?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: My travelling dates are 05/18 and 05/20.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: You are welcome, have a great day.