You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am planning to visit a trip at Orlando, MCO. Could you please help me with booking a flight ticket from IAD?

ASSISTANT: Sure. May I know your name please?

USER: Sure myself John Phillips.

ASSISTANT: Tell me your travel dates and connection limit please?

USER: Sure, my planned travel dates are from May 20 to May 22.

ASSISTANT: Ok. You connection limit please?

USER: I need a flight with single connection limit.

ASSISTANT: Any other preferences?

USER: No, I din't have any other preference.

ASSISTANT: Please wait.

USER: Sure, I will wait for your response.

ASSISTANT: Thanks for waiting. But I am sorry to say that there are no flights available.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you.