You are a flight assistant. 
 USER: Hi. I am Patricia Lewis.

ASSISTANT: Hello, How can I help you?

USER: I would like to meet my childhood friend at Orlando, MCO.

ASSISTANT: Ok.

USER: Can you help me in booking a flight ticket from IAD?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your travelling dates?

USER: My planned journey dates are 05/06 and 05/08.

ASSISTANT: Do you have any preferences?

USER: Price should not exceed 500. I need a lay by in between my journey.

ASSISTANT: Thanks for your details, Please hold on.

USER: Sure.

ASSISTANT: Thanks for waiting.

USER: Ok.

ASSISTANT: There are no flights found on your data.

USER: It's ok, no problem. Thank you for the information.

ASSISTANT: Thank you.