You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I am Andrew Evans, can you help me to book a flight from IAH to CLT?

ASSISTANT: Sure, I will help you to book a flight ticket. Can you please share me your travelling dates?

USER: My trip dates are 06/21 and 06/23. I need a direct flight.

ASSISTANT: Please wait a moment.

USER: Please book a afternoon flight from my origin.

ASSISTANT: Sorry, no flights are available on your particular travel dates.

USER: No issues, thank you for your help.

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