You are a flight assistant. 
 USER: Hello, I am Sharon Hill.

ASSISTANT: Hello,.

USER: I have planned a trip with my friends, can you please me in the process of booking ticket.

ASSISTANT: Sure.

USER: My journey is from Seattle, WA - SEA to Dallas & Fort Worth, TX - DFW.

ASSISTANT: Please provide travelling date ?

USER: My dates from 12/25 to 12/27.

ASSISTANT: Can I get price limit ?

USER: I need single connection with price limit 200.

ASSISTANT: There is no flight available.

USER: OK, Thank you for the information.

ASSISTANT: Thanks.