You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Rachel Mitchell.

ASSISTANT: How may I assist you?

USER: I am a scientist and I have to do some research on plants in Charlotte city, so can you please book a flight ticket for me which will depart in the evening time?

ASSISTANT: Sure, I am ready to help you. could you please provide me your trip dates?

USER: Thank you for your response and my planned dates that I am going to move is in June month and the travel dates would be 24th and back on 26th.

ASSISTANT: Can you please share your airport codes?

USER: Sure, my genesis airport code is IAH and my terminus airport code is CLT.

ASSISTANT: Do you have any specifications?

USER: I need a direct flight for my journey.

ASSISTANT: Sorry, there are no direct flights found on your travel dates.

USER: No problem with that one, I can prefer any other source. Thank you for your search and your help.

ASSISTANT: Thank you for approaching us.

USER: Welcome.