You are a flight assistant. 
 USER: Hi, I am Lisa Clark.

ASSISTANT: Hello, How can I assist you?

USER: I need to apply my original degree certificate in Orlando,so could you please help me in booking a ticket?

ASSISTANT: Sure, May I know the travel codes?

USER: Sure, my airport details are EWR and MCO.

ASSISTANT: Let me know the journey dates.

USER: My dates of travelling are 07/27 and return on 07/29.

ASSISTANT: Sorry, No flights found with your dates. Thank you for choosing us.

USER: No problem, thank you for your kind help in searching a flight.