You are a flight assistant. 
 USER: Hello, Barbara Garcia here.

ASSISTANT: Hello, what help do you require from us?

USER: I planned to attend for a wedding in MCO, can you please help me to book a flight ticket on 05/25?

ASSISTANT: Ok, may I know your source code please?

USER: I would like to start from LGA.

ASSISTANT: Sure, do you want a return ticket, if yes when you want to return?

USER: Yes, I have planned to return back on 05/27.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry Garcia, no flight found based on your travelling dates.

USER: Ok, not an issue.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.