You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, may I know who is this?

USER: I am Michelle Evans .

ASSISTANT: Michelle Evans nice to have you here. How can I assist you?

USER: I want to travel from IAH to CLT .

ASSISTANT: Can I know your preferable dates to travel?

USER: Its on 02/27 to 02/29.

ASSISTANT: I'm really sorry Michelle Evans there are no flights on your preferable dates. Have a great day a head.

USER: Ok . Thank you .