You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I am Brenda Anderson. Can you help me booking flight from PHL to DFW?

ASSISTANT: Sure, can you please share your travel dates?

USER: My trip dates are 05/08 and 05/10.

ASSISTANT: Let me check for the availability of flight. Brenda, I am sorry to inform you that there is no flight available at your requested dates.

USER: Oh! It's ok, no problem. Thank you for your services.

ASSISTANT: You are welcome. Thank you for reaching us.