You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Kevin Green.

ASSISTANT: How can I assist you?

USER: Can you help me in booking a ticket from MCO to DTW as I need to attend my brother wedding?

ASSISTANT: Sure Kevin, can I know the planned dates please?

USER: My travelling dates are 05/20 to 05/22.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

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

USER: Ok, no issue.

ASSISTANT: Thank you for your positive response.

USER: Thank you.

ASSISTANT: You are welcome.