You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hi,. How can I help you?

USER: I planned a trip for Dallas to visit the beaches with my friends, help me to find a flight under fare of 200.

ASSISTANT: Sure,may I know your name and specifications?

USER: My name is Gregory Hill, my origin and destination codes are from LAX to DFW. My travelling dates are from 12/26 to 12/28.

ASSISTANT: Give me some time,I will get back to you. Thank you for your patience. There is no ticket matching your journey dates.

USER: Ok. Thanks for your reply.

ASSISTANT: Thank you for choosing us.