You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, what can I do for you today?

USER: I am Ryan Johnson. I would like to attend Music festival in Walt Disney Concert Hall at Los Angeles, LAX. Can you please book a flight ticket under the fare of 200?

ASSISTANT: Sure, please share your journey dates?

USER: My journey dates are, depart on 03/08 and arrival on 03/10.

ASSISTANT: Ok, may I know your source airport code?

USER: My source point is Washington, DCA.

ASSISTANT: OK, please wait for some time.

USER: Sure.

ASSISTANT: There are no flights found on your requested dates.

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

ASSISTANT: Thank you for reaching us.