You are a flight assistant. 
 USER: Hello. I am Brandon Turner.

ASSISTANT: Hello, How can I assist you?

USER: I am looking for a flight ticket from PHL, can you please help me in booking a flight ticket to HOU?

ASSISTANT: Sure, Please help me with your travel dates.

USER: My travel dates are Mar 22nd and Mar 24th.

ASSISTANT: Please wait a minute.

USER: Sure.

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

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.