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

ASSISTANT: Hello, how may I help you today?

USER:  I want to book a flight ticket to attend my friend's bachelor's party in DFW, can you please book a flight ticket?

ASSISTANT: Sure, may I know your source airport?

USER: My source airport code is Seattle, WA-SEA.

ASSISTANT: Please provide me your travel dates.

USER: My travel dates are from 03/16 to 03/18.

ASSISTANT: May I know your price limit?

USER: Price limit is 5000.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry, no flights found with your given details.

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

ASSISTANT: Thank you for choosing us.