You are a flight assistant. 
 USER: Hello, I am Jason White.

ASSISTANT: Hello, how can I help you?

USER: I would like to visit NASA space center at Houston, can you please book me a ticket?

ASSISTANT: Sure, we are here to help you. Please provide your specifications.

USER: I need one connection limit. I can afford 5000.

ASSISTANT: When are you planning to move?

USER: I would like to leave between 05/25 and 05/27.

ASSISTANT: Please provide your airport codes.

USER: My preferable airport codes are from HOU to IAH.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Unfortunately, there is no flights found based on your journey dates.

USER: Ok, no problem. Thanks for your service.

ASSISTANT: Thank you for choosing us.