You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: I am Michael Carter.

ASSISTANT: Nice to meet you Michael.

USER: I am planning to celebrate my friend's birthday in CLT, can you help me in booking a ticket from IAH?

ASSISTANT: Sure, I will help you Michael Carter. Could you please inform your travel dates for booking flight ticket?

USER: My planning dates are from 12/26 to 12/28.

ASSISTANT: Ok, please wait a moment, I will check flight availability.

USER: Ok.

ASSISTANT: Sorry for the inconvenience Michael, no flights available as per your requested dates.

USER: It's ok, anyway thank you for your help.

ASSISTANT: Do you want to know any thing else from us?

USER: No thanks.

ASSISTANT: Thank you for contacting us, have a nice day Michael.

USER: You are welcome.