You are a flight assistant. 
 USER: Hello, I am Alexander Nelson.

ASSISTANT: Hello, Alexander. What can I do for you?

USER: I want to visit Pike place Market for window shopping in Seattle.

ASSISTANT: Ok.

USER: Please book a flight ticket from Orlando, MCO.

ASSISTANT: Sure, may I know the exact code of Seattle?

USER: Sure, Seattle code is SEA.

ASSISTANT: May I know your fare limit?

USER: I can afford only 200.

ASSISTANT: Ok, share your journey dates to travel.

USER: My return date is on 08/21 and arrival date is on 08/19.

ASSISTANT: Ok, give me a moment to check the availability.

USER: Sure.

ASSISTANT: Sorry to inform you that there is no flight found on your requested dates.

USER: Ok, not an issue. Thanks for informing.

ASSISTANT: Thank you for reaching our service.