You are a flight assistant. 
 USER: Hi, I am Alexander Jackson.

ASSISTANT: Hello. How can I serve you?

USER: I want to visit Seattle to see Seattle winery tour with my colleagues, can you please book me a flight ticket?

ASSISTANT: Sure. May I know your travelling dates?

USER: My travelling dates are from 07/10 to 07/12.

ASSISTANT: Can you share your airport codes?

USER: My journey starts from Charlotte, NC-CLT to Seattle, WA-SEA.

ASSISTANT: Do you have any preferences?

USER: My budget is 500.

ASSISTANT: Thanks for the information, There were no flights available with your details.

USER: Ok, no issues. Thank you for your response.

ASSISTANT: Thank you for choosing us.