You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Myself Christopher Anderson, will you help me in booking the flight  ticket from MCO to SFO?

ASSISTANT: Sure, may I know your planned dates of travel?

USER: My travelling dates are June 20 and June 22.

ASSISTANT: Do you have any specifications?

USER: My depart time must be in evening.

ASSISTANT: Ok, please wait a moment.

USER: Ok, I will wait for your response.

ASSISTANT: Sorry, there were no flights found on your preferred dates.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you.