You are a flight assistant. 
 USER: Hello. I am Donald Phillips.

ASSISTANT: Hello, how can I best serve you today?

USER: I would like to attend a music concert at San Francisco. Can you book a flight ticket from MCO to SFO?

ASSISTANT: Sure, when are you planning to depart and return on?

USER: I will start on June, 1 and return on June, 3.

ASSISTANT: Thank you for your details. There are no flights found with the given travelling dates.

USER: Ok, not a problem. I will find any other source to reach there. Thank you for the information.

ASSISTANT: Thank you, hope we serve you next time.