You are a flight assistant. 
 USER: Hi, I am Dorothy Brown.

ASSISTANT: Hello, How can I help you?

USER: I would like to do documentary on birds in Dallas, DFW. Will you help me in booking me a flight ticket from Los Angles, LAX?

ASSISTANT: Sure, May I know the travel dates?

USER: 10/23 - 10/25 are willing dates of travel.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, I will choose other airline. Thank you.

ASSISTANT: Thank you for reaching us.