You are a flight assistant. 
 USER: Hello. I am Virginia Davis.

ASSISTANT: Hello. How can I help you?

USER: I want to book a ticket to meet my friends, can you please help me to book a ticket?

ASSISTANT: Sure, may I know your travel dates?

USER: I would like to leave between 11/28 and 11/30.

ASSISTANT:  Help me with your travel points?

USER: My airport codes are from CLT to HOU.

ASSISTANT: Ok, please wait I will check the availability.

USER: Ok.

ASSISTANT:  Sorry, no flights were working on your travel dates.

USER: Ok, no problem. Thank you so much.

ASSISTANT:  Thank you for opting us.