You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am planning to attend my sister's engagement from IAD to MCO. Can you find a ticket for me?

ASSISTANT: Yes, can you please provide your travelling dates?

USER: Sure, my travelling dates are 02/23 to 02/25.

ASSISTANT: I am sorry there are no flights with your requirements.

USER: Ok, no problem.

ASSISTANT: Thank you for approaching us. May I know your name please for documentation purpose.

USER: Yes, I am Justin King. Thank you for your help.

ASSISTANT: You are welcome.