You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you now?

USER: I am Karen Hernandez. I want to book a flight from SFO to IAH. Could you help me?

ASSISTANT: Sure, I will help you with that. Can I have your travel dates please?

USER: My preferable dates are from 10/29 to 10/31.

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

USER: Ok, take your time.

ASSISTANT: Sorry Karen Hernandez, no flight is available to you on your dates.

USER: That's ok no problem. Thank you for helping me.

ASSISTANT: Thank you for choosing us, have a good day.